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Renewable resources Renewable resources Document Transcript

  • Definition of Renewable ResourceA substance of economic value that can be replaced or replenished in the same amount orless time as it takes to draw the supply down. Some renewable resources have essentially anendless supply, such as solar energy, wind energy and geothermal pressure, while otherresources are considered renewable even though some time or effort must go into theirrenewal, such as wood, oxygen, leather and fish. Most precious metals are consideredrenewable as well; even though they are not naturally replaced, they can berecycled because they are not destroyed during their extraction and use. Renewable Energy Sources In India !!Conventional sources of energy like coal, petrol, lignite and natural gas are limited and may soonbe exhausted. Moreover, their use is not environmental friendly. Their use causes lot of emissionof carbon and change in global climate. The use of these fossil fuels be decreased and those ofrenewable sources of energy increased to protect our earth and the quality of life.Essay And article On : Renewable Sources Of Energy !! The renewable sources of energy like wind, solar, tidal waves, biogas etc. hold a great potential. Renewable
  • sources of energy are becoming more and more popular. For example, there has been increased use of wind power in Germany and India. Non-conventional sources of energy ate cheap, clean and environment friendly and available locally in abundance in India.There is vast scope for the use of biogas in Indian vii/ages. Solar energy generation also holdsgreat promise as there is much bright sunshine during the greater part of the day throughout theyear. The wind power generation is also increasing in the country and thousands of wind-pumpshave been installed for irrigation and. drinking water and more are being installed. There is anever increasing demand for energy and the non- renewable or conventional sources of energy aredepleting fast. Energy is the motive power that keeps wheels of industry moving and other thingslive. Fossil fuel which includes coal, lignite, petroleum and natural gas is the non-renewable orconventional source of energy. Another source of traditional energy is fuel wood, animal wasteand agricultural residues but these are non-economical fuels.Also Read Good Library | Good Learning !! Nuclear Power In India | Nuclear Energy !!conventional sources of energy These conventional sources of energy are notsufficient to meet our fast increasing demand of energy as they are limited and may soon getexhausted. The use of conventional sources of energy creates environmental problems. Theincreased use of fossil fuels increases carbon emissions and quickens global climate change. Theenergy produced through these traditional fuels causes’ global warming, air pollution, depletionof forests and host of other ecological problems. The carbon dioxide emission in developingcountries has jumped by about 25 per cent in recent years. The pollution continues to worsen inmany cities of the world with 1.3 billion persons affected by poisonous air and many species ofplant and bird-life continued to be lost rapidly. Therefore, there is an urgent need to discouragethe use of traditional sources of energy and rapid phase out of subsidies on these.
  • The subsidies on fossil fuels have dropped by 50 per cent since 1992, but still it stands at $58billion. These subsidies harm the environment and hasten the depletion of these resources.During 1995 there was oil production to the tune of 3,031 million tonnes, that of coal 2, 109million tones and that of natural gas 2,114 million tonnes. It shows an increase of about one percent over the year 1994. Even this marginal increase was enough to push carbon emission fromfossil fuels to a new record. As we are approaching a new millennium, we must step up ourefforts to reduce the use of these fossil fuels and protect the environment. It is essential that theuse of renewable -sources of energy are appreciably stepped up to protect the future of the planetearth and the quality of life here. The renewable sources of energy like solar, wind, tidal waves,biogas etc. hold a great potential.There is a vast scope and many opportunities in this sector of power-generation. Their use so farhas been limited to non-commercial and Ismail domestic purposes in India and elsewhere.Modem science, technology, research and development have to play a significant role inpopularizing the increased use of non- conventional sources of energy both in industrial anddomestic sectors. These are bound to be used on alarger scale in a course of time but this ‘course of time’ should be curtailed and things expedited.There are really many very promising technologies and can very easily replace conventionalones. In the long term, they are likely to prove cost effective as well. The facts and figuresavailable in regard to the use of renewable sources of energy are really encouraging as they pointtowards greater and expanding role of their resources.Growth in wind generation was once confined to the US and Denmark but now it is ‘becomingpopular in other major countries like Germany and India. During 1995 Germany produced 505MW of wind energy followed by India with 375 MW. The conventional sources of energy inIndia provide over 95 per cent of our required energy. The fast depletion and scarcity of fossilfuels in our country underline the urgent necessity for developing and exploiting these non-conventional and renewable sources of energy which are really clean, environment-friendly andin a sense unlimited. Local availability of the renewable sources of energy in abundance makethem all the more significant for meeting our rural energy requirements. These hold out a majorpromise to overcome energy crisis in rural areas to a large extent. Since tidal waves resources arelimited only to a few coastal regions, greater emphasis should be laid on harnessing wind power,solar energy and development of biogas and biomass projects.Biogas can be increasingly used as a cooking fuel in towns and villages since it is cheap, cleanand convenient. It can also be used for lighting and running small motors for providing power to
  • cottage industries. The slurry from biogas is alsoan enriched manure. Family size biogas plants have picked up in many States like Tamil Nadu,Maharashtra, Andhra Pradesh etc. During the Seventh Plan nearly 141akh plants were set up inthe country. During the Eighth Plan, 7.5 lakh more plants were planned. The Plan also aimed atpopularizing the use of human excreta in the biogas plants.Solar energy generation holds great promise in the country. It is estimated that total solarinsulations or exposure to the rays of the sun per square meter surface is quite high in India. Forgreater part of the year during the day there is much bright sunshine throughout the country andit can be used to our great advantage to produce power for industrial and domestic use. Duringthe Seventh Five Year Plan, manufacturing bases for thermal devices like solar cookers and solarheating systems have been largely developed. Preparatory plant work for a solar thermal powerplant in Rajasthan was completed. During the Eighth Plan the use of solar Thermal Energy for industrial water heaters, solarcookers, solar timber kilns, solar desalination etc. were to be commercialized.Similarly, solar photovoltaic cells, indigenously produced at BHEL and Central Electronics Ltd.are being increasingly used under the Rural Electrification Programme in the remote villageswhere it is not possible to carry the electric lines. During the Eighth Plan, development ofamorphous silicon cell was to be the main thrust area. Power generation system of 10 to 100 KW
  • capacity area being undertaken wherever this renewable Source of energy is available.Steps have also been taken to harness the wind energy, Under a major demonstration programmeon wind energy, 32 MW capacity wind farms were set up in Tamil Nadu, Gujarat, Maharashtraand Orissa. BHEL has already developed wind machines with 200 MW capacity. With theentrance of private sector in the field, the use of wind energy has got the tremendous boost inrecent years. During the Seventh Plan itself 2,540 wind pumps were installed. The Eighth Planhad the target of 100 MW wind power generation by using indigenous wind machines. Theoperational programme of wind pumps for drinking water and irrigation is expanded andmodified. So this was an essay on renewable sources and energy.You may also like - Essay And article On : Global Warming | Fats,Effects And Causes !! Essay On Indiscipline | Indiscipline AmGlobal Warming| Fats,Effects And Causes !!March 14, 2012 By parm Leave a CommentinShare0
  • What Is Global Warming ??The year 1998 has been the hottest on record so far. The 1990s have seen the three hottest years.The average temperature has risen by 0.2′C in the recent decades. As a result of global warmingthere have been huge and unprecedented floods, storms, cyclones etc. resulting in destruction onvast scales. In recent years the concentrations of carbon dioxide, methane etc. have increasedalarmingly.Essay And article On : Global Warming | Fats,Effects AndCauses !!These greenhouse gases cause global warming and rise in earth’s temperature. Therefore thereare changes in climate, weather and rain patterns. These greenhouse gases do not let the sun’s re-radiation escape from the earth and so there is greenhouse effect and warming. They work like aglass house as they accumulate with particulates in the atmosphere because of the burning offossil fuels.The presence of Chloro Floro Carbons (CFCS) in the atmosphere has drastically depleted thevital cover of ozone. About a billion tons of pollutants are being released every year into theatmosphere. The highly industrialized nations are the biggest offenders as they emit the largestamount of these gases. Rapidly increasing deforestation has further increased the problem.Global warming not only causes natural calamities but also many epidemics like malaria, dengueetc.Also Read Global Water Crisis !! The Working Of The Divine Grace!!Problems Of Global Warming It is a global problem and should be addressedglobally by reducing the emission amount of the greenhouse gases and exploiting the renewablesources of energy. There has been increase in the general awareness about the dangers of global
  • warming but unfortunately nothing substantial has been done to check and prevent the menace.There have been many international pacts and agreements on the issue but no strict adherenceand compliance.The year 1998 has been the hottest year on record. It has set a new record of a high temperatureby a big margin. According to National Aeronautics and Space Administration (NASA) of USA,the average global temperature during 1998 was 0.18o C warmer than that of the previous recordin 1995. And the average global temperature in 1995 was 15.39o C which broke the previousrecord of 15.38o C of 1990. It shows a steady rise in the global temperature since 1970s.The ten hottest years in the last 130 years have all been in 1980s and 1990s. And out of these 10,the three hottest years were in 1990s. This inordinate warmth has begun to hit the earth and theentire living world. It is estimated that average temperature has risen by O.2oC every decade.The threat of the global warming is real and immense. A lot of imbalance has been created innature by human activities. Consequently there have been unprecedented and unexpecteddevastations, storms, etc. in various parts of the world specially in the coastal and low-lyingregions.The sea-levels have been rising throughout the globe all these years causing violent storms and cyclones here and there. For example, a cyclonewith winds of 270 km per hour wreaked havoc in Bangladesh in 1991 razing more than a millionhouses and claiming over 1 ,40,000 lives. During the 1990s Europe, America, Australia etc. haveexperienced the worst type of storms, hurricanes and tornadoes.Because of global warming temperatures rise, oceans and seas become warmer, and release moreenergy in the atmosphere which leads to violent storms and very huge losses in terms of man andmaterial. It is estimated that there has been rise in ocean temperature by 1°C per decade. In therecent decades the amount of carbon dioxide in the atmosphere has increased to 350 ppm (partsper million) from a preindustrial level of 275 ppm.Concentrations of carbon dioxide and methane remaining relatively constant up to the 18thcentury have risen sharply since then due to human activities. Concentration of nitrous oxidehave increased since the mid-eighteenth century, especially during the recent decades. Before the1930s there was no trace of chlorofluorocarbons (CFCS) in the atmosphere. The trapping of
  • green house gases in the atmosphere is mainly responsible of these dangerous trends of globalwarming.They raise the earth’s temperature which in its turn generates destructive storms, cyclones,droughts, floods, forest fires and such other havocs. Widespread human activities such asburning fossil fuels release carbon dioxide in the atmosphere in a very huge quantity and result ingreen house effect. Then there is a chain reaction. The polar ice begins to melt, the sea levelsbegin to rise and there are floods and storms.There has been a drastic change in the earth’s climate and weather patterns because ofenvironmental pollution and emission of green house gases. The green house effect contributesto the warming of the earth and rise in its temperature. The greenhouse effect can be generated ina green house. A greenhouse is a glass-house in which plants etc. are kept and grown. The solarradiation enters the green house through its glass covering and is absorbed by the plants,vegetables, etc. But the long wave infrared radiation cannot escapeback through the glass into the atmosphere and remains trapped. Consequently the temperatureinside the greenhouse rises. The similar effect happens to the earth. The earth’s atmosphereallows much of the sun’s radiation to warm the earth’s surface. The warm earth re-radiateselectro-magnetic radiation but some of it is absorbed by gases in its atmosphere and there isglobal warming and environmental pollution.These gases work as a glass-cover and do not permit the radiation to escape. They haveaccumulated along with the particulates in the atmosphere all these years because of undesirableand excessive burning of fossil fuels. The green house gases include carbon dioxide, carbonmonoxide, chlorine, methane and nitrous oxide.In recent years the amount of these gases has increased alarmingly as a result of the widespreadburning and combustion of fossil fuels. Coal, oil, natural gas etc. are the fossil fuels. It isestimated that about 55 per cent of global warming is because of absorption of solar radiation bycarbon dioxide and the remaining 45 per cent mainly by methane absorption and by damage tothe ozone layer as a result of the release of chlorofluorocarbons (CFCS) in the atmosphere.The size of the hole in the ozone layer observed over Antarctica in 1998 was the largest evermeasured and lasted a month longer than the preceding year. Argentina’s National WeatherService found that the area covered by low ozone values, that was continuously longer than 10
  • million square km for more than 100 days, was greater than the one observed during the 1996season.It was observed that the average amount of ozone during the months of September-October andNovember showed a shortfall of 40 per cent compared to average values before 1976. That yearis considered the base year for measuring atmospheric ozone. The hole started to appear 15 daysbefore the usual time, lasted 2-3 weeks longer and showed the longest duration of areas that hadvery low ozone. Ozone is a very minor constituent of the earth’s atmosphere but is very effectiveabsorber of biologically active solar ultraviolet radiation.This depletion of ozone layer has increased the radiation of ultraviolet rays on the surface of the earth which is very harmful for all living creatures. Itcauses skin cancer in human beings. It is estimated that about a billion tons of pollutants arebeing released every year into the atmosphere. The blanket of carbon emissions is everincreasing and thickening. It has resulted in over 30 per cent more carbon dioxide in theatmosphere today than 200 years ago. Advanced and highly industrialized countries producemore than half of the world’s carbon dioxide emissions.The US alone has 5.2 tons of carbon dioxide emission per head. East Europe is producing 3 tonsper head of carbon dioxide, West Europe 2.1 tons, China 0.6 tons, Africa 0.3 tons followed byIndia 0.2 tons. One of the major factors for this emission is the large scale and indiscrimate useof fossil fuels in automobiles, factories, households etc. For example, Delhi is one of the mostpolluted cities.It is a poisoned metropolis with smokes, fumes and such other emissions. Over 2.000 metric tonsof pollutants are released in the atmosphere every day which include carbon monoxide, nitrogendioxide, hydrocarbons and sulphur dioxide. Every tenth person in Delhi is either patient ofasthma or other respiratory disease. The number of vehicles in Delhi is over 27 lakhs which onthe road emit nearly 1600 MT pollutants in the atmosphere and the children are the worstaffected.
  • The lead content in the air is as high as 0.2 ppm (parts per million) to 1.8 ppm against thepermissible limit of 0.5 ppm. The highly active yellowish gas nitrogen oxide gas is emitted in theair when fossil fuel is burnt at high temperatures in motor engines and factories. This highconcentration of nitrogen oxide causes many types of respiratory diseases besides acid rains.There is high concentration of particles of dust, soot etc. in the atmosphere of Delhi which isresponsible for dense fog for many days during winter and there is disruption of air, road and railtraffic and sometimes there are fatal accidents. Ever increasing destruction of forests and greencover has further worsened the problem. Deforestation and destruction of vegetation has reducedthe amount of absorption of carbon dioxide by plants from the atmosphere. Plants use and absorbcarbon dioxide and manufacture carbohydrates.The indiscriminate industrialization and felling of trees for timber, fuel and human habitationhave further aggravated the problem of global warming and environmental pollution. Emissionof green house gases in such large quantities cause many kinds of respiratory and skin diseases.They also help in the increase of such diseases as malaria, dengue and cholera.In some regions of the world the effects of global warming are now being felt very acutely in theform of climatic and weather changes, droughts, famines, epidemics, destruction of wildlife,huge forest fires, devastating floods, soil-erosion, acid rains and the turning of the fertile soil intoarid land. Global problems need global cooperation and solutions.The problem of global warming is a world-wide problem and calls for a determined andcombined efforts by all the nations of the world. The need of the hour is to reduce the emissionof green house gases. Alternative fuels should also be searched and developed besides creatingmore efficient automobiles. The use of renewable sources of energy should be encouraged anddeveloped on a large scale. Wind power, solar-energy, tidal power, hydroelectricity are some ofthe well known renewable sources of energy. They are not only clean but also freely availableand in abundance in nature.They can be exploited to our great advantage. We need to redefine and redesign our energyneeds in order to reduce the global warming. There has been increase in the general awarenessabout the pollution of the atmosphere and the dangers to survival and subsistence because of theemission of the green house gases. But there has been little action to check and eliminate themenace.The UN and its member nations have been indulging in empty talks, discussions and futileexercises ever since 1972 when the first meet on environment was held in Stockholm. Similarlythe Rio Convention has come and gone and so has the Montreal protocol. N Conference onGlobal Warming was held in December 1997 in Kyoto (Japan). There were about 10,000visitors, 1,500 officials, 5,000 environmentalists and 3,000 journalists in the meet. Not unlikeother such conferences, it also generated much heat, hype and verbosity but no concrete results.It really failed to deliver. After a long deadlock and haggling a labored and grumbling pact wasreached. Under this patchwork called Kyoto Pact it was agreed that the developed nations ofEurope besides the USA would cut green house emission to 1980 levels by 2010. But it is worth
  • mentioning that during 1960-1980 the world has produced more green house gases than wasgenerated in the whole earlier history.Moreover, the Kyoto Protocol fails to mention any authority or mechanism to ensure complianceof the provisions and commitments. The USA signed the Kyoto Pact on 12 November 1998 butit was just a symbolic act because its ratification by the Senate is not likely in near future. Andthe US Senate would not ratify it unless some other countries like China, India and Brazil alsoreduced and cut the carbon dioxide and such other emissions which are just a small fraction ofthe levels of the developed nations.The Global Warming Summit held in Buenos Aires in November, 1998 is the latest. The BuenosAires Plan of Action agreed to set a timetable for discussing by the year 2000 the many issuesthat need to be settled. These include whether to impose penalties on those countries who do notachieve their goals, as to how to transfer climate friendly technology to developing nations sothey reduce pollution and emission of green house gases.We need to have greater respect for the earth and its environment. It is high time that the peopleof the world realize the gravity of problem and make determined and combined efforts to reduceglobal warming appreciably. It is feared that global warming might drive millions of people fromtheir hearths and homes in the new millennium especially in such low-lying Third Worldcountries as Bangladesh.The imminent melting of ice-caps and rise in sea-levels may threatenislands unless we immediately stop the emission of green house gases inthe atmosphere. In view of the possible threat to their very existence anumber of island nations have formed their own association calledAlliance of Small Island States (AOSIS). Unless some serious andmeaningful efforts are made on national and international levels tocheck the menace of global warming, the future appears bleak andforeboding. Renewable Energy Sources In India !!Conventional sources of energy like coal, petrol, lignite and natural gas are limited and may soonbe exhausted. Moreover, their use is not environmental friendly. Their use causes lot of emissionof carbon and change in global climate. The use of these fossil fuels be decreased and those ofrenewable sources of energy increased to protect our earth and the quality of life.Essay And article On : Renewable Sources Of Energy !!
  • The renewable sources of energy like wind, solar, tidal waves, biogas etc. hold a great potential. Renewable sources of energy are becoming more and more popular. For example, there has been increased use of wind power in Germany and India. Non-conventional sources of energy ate cheap, clean and environment friendly and available locally in abundance in India.There is vast scope for the use of biogas in Indian vii/ages. Solar energy generation also holdsgreat promise as there is much bright sunshine during the greater part of the day throughout theyear. The wind power generation is also increasing in the country and thousands of wind-pumpshave been installed for irrigation and. drinking water and more are being installed. There is anever increasing demand for energy and the non- renewable or conventional sources of energy aredepleting fast. Energy is the motive power that keeps wheels of industry moving and other thingslive. Fossil fuel which includes coal, lignite, petroleum and natural gas is the non-renewable orconventional source of energy. Another source of traditional energy is fuel wood, animal wasteand agricultural residues but these are non-economical fuels.Also Read Good Library | Good Learning !! Nuclear Power In India | Nuclear Energy !!
  • conventional sources of energy These conventional sources of energy are notsufficient to meet our fast increasing demand of energy as they are limited and may soon getexhausted. The use of conventional sources of energy creates environmental problems. Theincreased use of fossil fuels increases carbon emissions and quickens global climate change. Theenergy produced through these traditional fuels causes’ global warming, air pollution, depletionof forests and host of other ecological problems. The carbon dioxide emission in developingcountries has jumped by about 25 per cent in recent years. The pollution continues to worsen inmany cities of the world with 1.3 billion persons affected by poisonous air and many species ofplant and bird-life continued to be lost rapidly. Therefore, there is an urgent need to discouragethe use of traditional sources of energy and rapid phase out of subsidies on these.The subsidies on fossil fuels have dropped by 50 per cent since 1992, but still it stands at $58billion. These subsidies harm the environment and hasten the depletion of these resources.During 1995 there was oil production to the tune of 3,031 million tonnes, that of coal 2, 109million tones and that of natural gas 2,114 million tonnes. It shows an increase of about one percent over the year 1994. Even this marginal increase was enough to push carbon emission fromfossil fuels to a new record. As we are approaching a new millennium, we must step up ourefforts to reduce the use of these fossil fuels and protect the environment. It is essential that theuse of renewable -sources of energy are appreciably stepped up to protect the future of the planetearth and the quality of life here. The renewable sources of energy like solar, wind, tidal waves,biogas etc. hold a great potential.There is a vast scope and many opportunities in this sector of power-generation. Their use so farhas been limited to non-commercial and Ismail domestic purposes in India and elsewhere.Modem science, technology, research and development have to play a significant role inpopularizing the increased use of non- conventional sources of energy both in industrial and
  • domestic sectors. These are bound to be used on alarger scale in a course of time but this ‘course of time’ should be curtailed and things expedited.There are really many very promising technologies and can very easily replace conventionalones. In the long term, they are likely to prove cost effective as well. The facts and figuresavailable in regard to the use of renewable sources of energy are really encouraging as they pointtowards greater and expanding role of their resources.Growth in wind generation was once confined to the US and Denmark but now it is ‘becomingpopular in other major countries like Germany and India. During 1995 Germany produced 505MW of wind energy followed by India with 375 MW. The conventional sources of energy inIndia provide over 95 per cent of our required energy. The fast depletion and scarcity of fossilfuels in our country underline the urgent necessity for developing and exploiting these non-conventional and renewable sources of energy which are really clean, environment-friendly andin a sense unlimited. Local availability of the renewable sources of energy in abundance makethem all the more significant for meeting our rural energy requirements. These hold out a majorpromise to overcome energy crisis in rural areas to a large extent. Since tidal waves resources arelimited only to a few coastal regions, greater emphasis should be laid on harnessing wind power,solar energy and development of biogas and biomass projects.Biogas can be increasingly used as a cooking fuel in towns and villages since it is cheap, cleanand convenient. It can also be used for lighting and running small motors for providing power tocottage industries. The slurry from biogas is alsoan enriched manure. Family size biogas plants have picked up in many States like Tamil Nadu,Maharashtra, Andhra Pradesh etc. During the Seventh Plan nearly 141akh plants were set up in
  • the country. During the Eighth Plan, 7.5 lakh more plants were planned. The Plan also aimed atpopularizing the use of human excreta in the biogas plants.Solar energy generation holds great promise in the country. It is estimated that total solarinsulations or exposure to the rays of the sun per square meter surface is quite high in India. Forgreater part of the year during the day there is much bright sunshine throughout the country andit can be used to our great advantage to produce power for industrial and domestic use. Duringthe Seventh Five Year Plan, manufacturing bases for thermal devices like solar cookers and solarheating systems have been largely developed. Preparatory plant work for a solar thermal powerplant in Rajasthan was completed. During the Eighth Plan the use of solar Thermal Energy for industrial water heaters, solarcookers, solar timber kilns, solar desalination etc. were to be commercialized.Similarly, solar photovoltaic cells, indigenously produced at BHEL and Central Electronics Ltd.are being increasingly used under the Rural Electrification Programme in the remote villageswhere it is not possible to carry the electric lines. During the Eighth Plan, development ofamorphous silicon cell was to be the main thrust area. Power generation system of 10 to 100 KWcapacity area being undertaken wherever this renewable Source of energy is available.Steps have also been taken to harness the wind energy, Under a major demonstration programmeon wind energy, 32 MW capacity wind farms were set up in Tamil Nadu, Gujarat, Maharashtraand Orissa. BHEL has already developed wind machines with 200 MW capacity. With the
  • entrance of private sector in the field, the use of wind energy has got the tremendous boost inrecent years. During the Seventh Plan itself 2,540 wind pumps were installed. The Eighth Planhad the target of 100 MW wind power generation by using indigenous wind machines. Theoperational programme of wind pumps for drinking water and irrigation is expanded andmodified. So this was an essay on renewable sources and energy.The sooner the nations of the world reach a consensus on cutting the generation and emission ofgreen house gases, the better. It would be suicidal not to head the alarming bells which havealready started ringing as a result of our deliberate and systematic devastation and degradation ofso precious environment. Mankind’s environmental radar has begun to register the impact ofglobal warming, but it is too late, and too little has been done so far to check it. Our efforts tocheck the global warming should include both preventive and curative measures. We shoulddevelop both long and short term strategies to overcome the devil of environmental pollution.Sothis was an essay on global warmong students Its effects And Causes !! Essay And Article On : Science Has Benefited Us But Has It Civilized Us ?Investopedia explains Renewable ResourceRenewable resources have become a focal point of the environmental movement, both politicallyand economically. Energy obtained from renewable resources puts much less strain on thelimited supply of fossil fuels (non-renewable resources). The problem with using renewableresources on a large scale is a cost problem and in most cases, more research is needed to maketheir use cost-effective.Read more: http://www.investopedia.com/terms/r/renewable_resource.asp#ixzz2K137UdvMImportance of Renewable Resources of Energyby Eric Moll, Demand Media
  • Sunlight replenishes most renewable energy sources every day.Thomas Northcut/Photodisc/Getty ImagesRelated Articles Definition & Examples of Renewable Resources Renewable Energy Sources The Advantages of Renewable Natural Resources What Challenges Can Result From Overuse of Renewable Resources? How Renewable Energy Can Contribute to the Growth of Our Country Do Nonrenewable Resources Cause Pollution?ShareShare on facebookFacebookShare on twitterTwitterShare on diggDiggShare on stumbleuponStumbleUponShare on emailSend to a FriendMore Sharing ServicesMore »Sponsored LinksEnergy Audit
  • Save on Electricity Bills, Carry Energy Audit by UK based MNCwww.ascertiva.inRenewable energy is reliable and plentiful and will potentially be very cheap once technologyand infrastructure improve. It includes solar, wind, geothermal, hydropower and tidal energy,plus biofuels that are grown and harvested without fossil fuels. Nonrenewable energy, such ascoal and petroleum, require costly explorations and potentially dangerous mining and drilling,and they will become more expensive as supplies dwindle and demand increases. Renewableenergy produces only minute levels of carbon emissions and therefore helps combat climatechange caused by fossil fuel usage.Renewable How?Renewable energy sources are so named because, aside from geothermal and tidal energies, theyare replenished constantly by sunlight. Uneven solar heating of the Earths surface causes wind.Sunlight also fuels the water cycle, which is harnessed through hydropower, includinghydroelectric dams and less invasive systems that harness streams or ocean currents. Biofuels aregrown using sunlight. Geothermal energy is considered renewable because radioactive decay inthe Earths core, which isnt expected to cool down any time soon, produces it. The gravitationalpull of the sun and moon causes the tides.AccessibilityCoal, natural gas and oil reserves are finite and hidden. An unknown and limited amount of eachresource is buried deep underground or under the ocean. As more is harvested, finding newsources becomes more difficult and more expensive, and exploiting them becomes morechallenging and sometimes dangerous as well. Marginal reserves, such as oil sands, require theburning of huge amounts of natural gas to refine them into usable oil (see References 1). Drillingunder the ocean floor can lead to catastrophic accidents, such as the British Petroleum oil spill of2010 (see References 2). Renewable energy, by contrast, is as easy to find as wind or sunlight.Reliability, Stability and SafetyThe daily price of oil depends on many factors, including political stability in historically volatileregions. Political strife has caused energy crises, including those that occurred in 1973 and 1979(see References 3). Renewable energy can be locally produced and therefore is not vulnerable todistant political upheavals. Many of the safety concerns surrounding fossil fuels, such asexplosions on oil platforms and collapsing coal mines, do not exist with renewable energy.PollutionRenewable energy is far cleaner than fossil fuels. Coal mining and petroleum exploration andrefinement produce solid toxic wastes, such as mercury and other heavy metals. The burning of
  • coal to produce electricity uses large quantities of water, often discharges arsenic and lead intosurface waters and releases carbon dioxide, sulfur dioxide, nitrogen oxides and mercury into theair (see References 4). Gasoline and other petroleum products cause similar pollution. Thesepollutants cause respiratory illnesses and death in humans, produce acid rain that damagesbuildings and destroys fragile ecosystems, and deplete the ozone layer.Climate ChangeStrong consensus in the scientific community states that climate change and global warming areoccurring and are caused by human production of carbon dioxide and other greenhouse gases.Climate change may also damage agriculture, cause widespread extinctions, imperil clean watersupplies and aid the spread of tropical diseases (see References 5).Sponsored LinksSolar Power/EnergySolar Power Farms,Solar Panels, Solar Power Solutions & Products.www.waaree.comAquashear Coanda Screenrun of river hydro intake screens Self-cleaning, low maintenancewww.Aquashear.comAustralian Solar TrackersAustralian made dual axis trackers Grid feed in or stand alone systemswww.upton.com.auTESLAThe most accurate electricity & gas forecasting models in the worldwww.teslaforecast.comReferences 1. Canada National Energy Board: Canadas Oil Sands 2. U.S. Environmental Protection Agency: EPA Response to the BP Spill 3. Energy Information Administration: 25th Anniversary of the 1973 Oil Embargo 4. U.S. Environmental Protection Agency: Coal 5. U.S. Environmental Protection Agency: Health 6. U.S. Environmental Protection Agency: Non-Hydroelectric Renewable EnergyAbout the Author
  • Eric Moll began writing professionally in 2006. He wrote an opinion column for the "ArizonaDaily Wildcat" and worked as an editor for "Persona Literary Magazine." He has a Bachelor ofScience in environmental science and creative writing from the University of Arizona.Photo Credits Thomas Northcut/Photodisc/Getty ImagesImportance of renewable energy sourcesRenewable energy systems - General infoLately there has been some problems in the supply of conventional energy sources (those thatcome from fossil fuels) so it is really no wonder that more and more nations are interested to usedifferent renewable energy systems in order to satisfy their growing energy demand. Allrenewable energy systems have one thing in common, namely the fact that there are harnessedfrom nature. This means that they are constantly replenished unlike the fossil fuels that are likelyto run out in years to come. These advantages are making them more and more popularcompared to conventional energy sources.Renewable energy sectors are all about using natural sources to create energy. These naturalsources usually include the sun, water, wind, and geothermal sources. The science andtechnology are constantly developing so it is logical to expect even more renewable energysources in years to come, as well as the highly improved efficiency of existing ones.Many people think of the sun, or to be more precise solar energy as the main future energysource. Throughout the history of the humanity Sun has been used to give light and heat butSuns almost unlimited potential can provide electricity enough for the whole planet. Differentmethods have been used to harness energy from Sun, and the simplest method is through the useof a photovoltaic cells. Photovoltaic cells contain a special technology that traps the suns energyand converts it into electricity.Water is also one very important source for clean renewable energy. The most common form ofusing water to get electricity is hydroelectric energy that is acquired from large river dams.Hydroelectric power stations are usually built in large river systems that have big quantifies ofwater. The more water there is, the easier it is to produce kinetic energy, which is then used toproduce electricity. Beside hydroelectric energy there are also some other energy sources thatharness water to get electricity such as wave and tidal power.Wind power is also one renewable energy sector in the rise, especially in some Europeancountries like Denmark and Germany. Basically wind power uses the same principle found inhydroelectric dams to convert the wind kinetic energy to electricity. There are lots of windy areas
  • across the globe, and in many parts of the world people are trying to harness wind energy asmuch as possible, though efficiency of this energy source still remains a big problem, largelybecause of inconsistency of wind blowing.Geothermal power is another excellent form of renewable energy system. Geothermal energyuses the heat from deep inside the earth to produce electricity. Various methods have beendeveloped to do this, and the most common method is harnessing the steam that naturally comesout of fissures on the ground. Geothermal energy is mostly used on Iceland.It is not very had to conclude that if science and technology continue their development,renewable energy systems could be more than enough to satisfy world energy demand in years tocome. If this happens this will have very positive effect by eliminating our dependence on fossilfuels, which has blamed as the main factor contributing to climate change problem.Main advantage of using renewable energy sourcesThough there are some significant advantages in using renewable energy sources fossil fuels stillremain dominant energy sources in many parts of the world. For instance statistical data showsthat the United States still gets 90% of its electricity from fossil fuels and nuclear power plants.Despite recent "go green" strategy in United States coal-burning power plants are still dominantsources for producing electricity. Of course these power plants are also the countrys largestemitter of carbon dioxide, a greenhouse gas that is mostly responsible for climate change andglobal warming problem. Coal is really the main source of pollution and greenhouse gasesaround the world, mainly because this fossil fuel is cheap and easily available which makes itsuse justifiable from economic point of view.Obama and the federal government are working hard to decrease countrys reliance to coal powerby providing at least 20% of countrys total energy demand from renewable sources of energy by2020. Generally speaking ever-increasing use of fossil fuels has done big damage to ourenvironment and now we have to take care of that before it is too late. With this in mindtechnology and science are working hard to introduce highly improved renewable energy sourcessuch as wind, solar, geothermal to lessen our dependence on coal and other fossil fuels.Many energy experts agree that a very good start would be utilizing the power of the sun. This isthe oldest energy source that has vast potential so it is really a surprise why this technology hasnot been used earlier. As the world energy demand keeps on growing there is also the need toconvert the suns energy to electricity on a much larger scale. Solar power has potential tobecome one of the most cost-effective renewable energy sources, with a little more investmentson solar panels and generators needed to really make the difference. Solar panels that are creatednowadays can be very easy adapted with the architectural design of modern-day homes andoffice buildings. The negative factor are high installation costs that are still more expensive thansimply buying power from utility companies, but the benefits can soon bring back that bit moremoney invested in it.Wind energy is a cheaper alternative to solar power. There are growing number of people thatinstall do-it-yourself windmills on their lands to generate enough electricity for their homes,
  • ranches, and farms. Windmills of course have long history and tradition of using it, and if youreon a windy location you should definitely consider using this renewable energy source. Somecountries like Denmark, Spain, Portugal and the Great Britain are utilizing wind farms to powerlarge portions of their communities. Modern-day wind turbines still havent been used to theirfull potential in United States, though there is significant progress in some U.S. states.Geothermal energy is definitely a renewable energy source to consider. The trapped heat inearths core can be greater than 9,000 degrees Fahrenheit. By harnessing its steam we can turnthis heat into electricity. Besides this we can also use the energy from the underground directlyby installing geothermal heat pumps to generate home heating and cooling provisions for bothhouseholds as well as industrial facilities.Sustainable energy future can be only done with the help of renewable energy sources and thisreally is the main advantage that these energy sources have over traditional fossil fuels. Worldhas come to a point where it has to not only satisfy ever-growing energy demand but also to dothis on ecologically acceptable way in order to save our environment, and this cant be donewithout the renewable energy sources.Why is renewable energy sector so important?Many energy experts believe that we are using negligible percentage of currently availablerenewable energy, and that energy sector should be much more exploited than it is today. If wecould only be using a small part of currently available Suns energy for instance that would bemore than enough to satisfy global energy demand couple of times.Using renewable energy sources is not only highly beneficial from energetic point of view butalso from ecological point of view because by utilizing the renewable energy we can save ourenvironment for our future generations. Currently the most talked about renewable energysources are wind and sun, and many people see these two energy sources dominant in years tocome.Our world needs quick awakening and much better use of renewable energy sources if we wantto save our planet. Fossil fuels are not only sources of tremendous pollution but also sources ofheat trapping gases, most notably CO2, responsible for climate change problem. Therefore it isof vital importance to continue development in science in technology to improve efficiency andcost-competitiveness of renewable energy sources so theyll be able to put fossil fuels aside.There are certain drawbacks in using renewable energy. For instance the solar power issignificantly less effective in cloudy weather and the wind power highly ineffective to use duringcalm days. But combining couple of renewable energy sources can hide these drawbacks. Forinstance a home solar power has the ability to generate power all day while a home wind powercan generate power only when strong wind blows, so these systems can compliment each otherand make up for each others weaknesses.Unless we choose renewable energy future as the "energy go guide" the world will not only have
  • problems with future energy demand but well be also creating tremendous environmental messthat will make life of future generations very difficult.Posted by Davor HabjanecMarks: geothermal energy, renewable energy, solar energy, wind energy