Global Warming And Renewable Energy


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Global Warming And Renewable Energy

  2. 2. INTRODUCTIONThis work deals with the constant effect that greenhouse gasesemissions have contributed to Global Warming and it helps toawareness about what our planet is happening.But we don’t pretend to stop it, cause that’s impossible. GlobalWarming have been a natural process since the past but in theselast years humans activities have increased it.Since the Industrial Revolution began around 1750, humanactivities have contributed substantially to climate change byadding CO2 and other heat-trapping gases to the atmosphere.These greenhouse gas emissions have increased the greenhouseeffect and caused Earth’s surface temperature to rise. Theprimary human activity affecting the amount and rate of climatechange is greenhouse gas emissions from the burning of fossilfuels.And that’s why is important to minimize this effect as much aspossible with this new renewable energy.It is up to us to save the planet where we are living.
  3. 3. Global Warming is the increase ofEarths average surfacetemperature due to effect ofgreenhouse gases, such as carbondioxide emissions from burningfossil fuels or fromdeforestation, which trap heat thatwould otherwise escape fromEarth.This is a type of greenhouse effect.
  4. 4. However, greenhouse gasemissions have increasedespecially since theIndustrial Revolutionbegan around 1750. Therecent warming trendreflects its impacts.The rising temperaturespresent a huge threat toour ice-caps.
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  6. 6. Carbon dioxide and other air pollution that is collectingin the atmosphere like a thickening blanket, trapping thesuns heat and causing the planet to warm up.Coal-burning power plants are the largest U.S. source ofcarbon dioxide pollution -- they produce 2.5 billion tonsevery year. Automobiles, the second largest source, createnearly 1.5 billion tons of CO2 annually.
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  8. 8. Energy from the sun drives the earth’s weather andclimate, and heats the earth’s surface;In turn, the earth radiates energy back into space;Some atmospheric gases (water vapor, carbondioxide, and other gases) trap some of the outgoingenergy, retaining heat somewhat like the glass panels of agreenhouse;These gases are therefore known as greenhouse gases;The greenhouse effect is the rise in temperature on Earthas certain gases in the atmosphere trap energy.
  9. 9. Global warming is a complexphenomenon, and its full-scale impacts are hard topredict far in advance. Buteach year scientists learnmore about how globalwarming is affecting theplanet, and many agree thatcertain consequences arelikely to occur if currenttrends continue.
  10. 10. Among these:Melting glaciers, early snowmelt and severe droughts will causemore dramatic water shortages in the American West.
  11. 11. Rising sea levels will lead to coastal flooding on the Easternseaboard, in Florida, and in other areas, such as the Gulf ofMexico.
  12. 12. Warmer sea surface temperatures will fuel more intensehurricanes in the southeastern Atlantic and Gulf coasts.Forests, farms and cities will face troublesome new pestsand more mosquito-borne diseases.Disruption of habitats such as coral reefs and alpinemeadows could drive many plant and animal species toextinction.
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  16. 16. • Global warming is already underway withconsequences that must be faced today as well astomorrow.• Evidence of changes to theEarths physical, chemicaland biological processes is now evident on everycontinent.• Effects such as changes in temperatures and rainfallpatterns that alter plant and animal behavior andhave significant implications for humans.
  17. 17. We can divide the global warming effects in differentcategories. For instance, in this work will group theeffects in five main categories:• Freshwater• Oceans• Ecosystems• Temperature• And finally, Effects on People
  18. 18. Effects of Global WarmingFRESHWATERExtreme Wet and Extreme DryA warmer climate spurs the evaporation of water from land and sea andallows the atmosphere to hold more moisture—thus setting the stage formore extreme precipitation.• Northern Scandinavia and South and North Korea recorded precipitationincreases of 3-15 percent per decade between 1979 and 2005.• In the U.S. Northeast, the number of days with very heavy precipitationrose by 58 percent over the last 50 years.Yet even as rainfall occurs in heavier events, the periods between theseextremes are likely to become longer, warmer, and drier. In conclusion: Wetplaces tend to get wetter (and dry places tend to get drier).
  19. 19. Effects of Global WarmingFRESHWATERExtreme Wet and Extreme DryIn dry areas, the Global warming is expressed in two ways:• Increased drought in dry areas. Precipitation has declined in thetropics and subtropics since 1970. Southern Africa, the Sahel regionof Africa, southern Asia, the Mediterranean, and the U.S.Southwest, for example, are getting drier.• Expansion of dry areas. Scientists expect the amount of landaffected by drought to grow by mid-century—and water resources inaffected areas to decline as much as 30 percent.
  20. 20. Effects of Global WarmingOCEANSSea Ice and Sea LevelHigher temperature derives in shrinking land ice, such as mountain glaciers andpolar ice sheets; it is releasing water into the oceans rising the sea level.Why is it important? How does it affect us?Well, around 40% of world’s population lives in coastal areas. So, higher level ofthe sea has an economical impact because reduces beaches and affectproperties in this areas.But, more dangerous is the fact that rise of sea level affects our naturalprotections (example: barrier islands) against natural catastrophes such asstorms, hurricanes, tsunamis, etc.All of this is too dangerous to people and coast infrastructure.
  21. 21. Effects of Global WarmingECOSYSTEMSLakes and RiversGlobal Warming produce problems in the Freshwater supply drying lakes andrivers. This affects to animals and plants living there and derives in effects such as:•Displacement of species (rise of water temperature makes that species likefishes moving to colder waters).•Dead zones (higher temperatures affects the normal level of oxygen in the water).•Reproduction (rising amounts of precipitation that falls as rain rather thansnow, and more severe and frequent flooding affect the reproduction of aquaticspecies like salmon).
  22. 22. Effects of Global WarmingTEMPERATUREAirRising air temperatures bring heat waves, spread disease, shift plant andanimal habitat and cause extreme weather events, from drought toblizzards.Over the last 50 years, the number of cold days and record lowtemperatures in various locations has declined, while the number of hotdays and heat waves has risen most places worldwide.The best projections show that average global temperatures are likely toincrease 3.1-7.2 F (1.8-4.0 C) by the end of the century depending onthe amount of carbon emissions.
  23. 23. Effects of Global WarmingTEMPERATUREOceans and FreshwaterHow we know, warmer oceans put coastal communities at risk, increaseinfrastructure costs, endanger polar creatures and threaten coral reefs andfisheries. Perhaps most alarmingly, rising ocean temperatures acceleratethe overall warming trend.Not only are ocean surface waters getting warmer, but so is water 1,500 feetbelow the surface. These increases in temperature lie well outside thebounds of natural variation.Scientists also know that freshwater temperatures are rising because warm-water species are moving into areas that were formerly too cold, while cool-and cold-water species are likewise on the move.
  24. 24. Effects of Global WarmingTEMPERATUREGroundAs permafrost (frozen ground) thaws, it releases heat-trapping gases into theatmosphere, which accelerates global warming. It also alters localecosystems and destabilizes infrastructure, necessitating costly repairs.Permafrost is very sensitive to direct changes in air temperature and snowcover, making it especially vulnerable to global warming.And as permafrost thaws, it can release both carbon dioxide and methanefrom carbon often stored in soil for thousands of years.The thawing of permafrost in northern forests could completely alter localecosystems. Existing thawing is already destabilizing the humaninfrastructure, which require frequent repair.
  25. 25. Effects of Global WarmingPEOPLEHealthAs our climate changes, the risk of injury, illness, and death from theresulting heat waves, wildfires, intense storms, and floods rises.Extreme heat can be a killer especially when combined with high relativehumidity.Changing precipitation patterns and prolonged heat can create drought,which can cause forest and peat fires, putting residents and firefighters indanger.Another effect is the smog. Higher air temperatures increase smog, creatingproblems to people’s health.
  26. 26. Effects of Global WarmingPEOPLEFoodClimate-related threats to global food production include risks tograin, vegetable, and fruit crops, livestock, and fisheries.Global warming alters seasonal rainfall patterns delaying planting andharvesting and creating scarcity of some foods (affecting their prices, too).Higher temperatures decrease productivity of ground. In other hand, increasepests because insect and plant pests may survive or even reproduce moreoften each year if cold winters no longer keep them in check.
  27. 27. Effects of Global WarmingPEOPLEEconomic EffectsClimate change also has important economic effects on people. Scientistsand economists are beginning to grapple with the serious economic andenvironmental consequences if we fail to reduce global carbon emissionsquickly and deeply. The most expensive thing we can do is nothing.Damage to property and infrastructure. Sea-levelrise, floods, droughts, wildfires, and extreme storms require extensive repairof essential infrastructure such as homes, roads, bridges, railroadtracks, airport runways, power lines, dams, levees, and seawalls. All of thisrequires money, many money.
  28. 28. Effects of Global WarmingPEOPLEEconomic EffectsLost productivity. Disruptions in daily life related to climate change canmean lost work and school days and harmtrade, transportation, agriculture, fisheries, energy production, andtourism, creating difficulties to people to make daily economic activities.One effect too severous of climate change are the «climate refugees»—people who are forced to leave their homes because of drought, flooding, orother climate-related disasters.
  29. 29. “CLEAN ENERGY”Most of our electricity comes from power stations that use fossilfuels like coal and oil.The power stations burn the fossil fuels to make our electricity andin that process a LOT of greenhouse gas is made, including carbondioxide and methane. This is why they are called dirty sources ofenergy.
  30. 30. It is the greenhouse gases that are causing the Earthsatmosphere to warm, which scientists tell us willcause the climate to change. It is understood that thiswill cause more extreme weather, the spread ofdiseases and threaten the habitat of all living things.Coal, oil and gas are non-renewable sources ofenergy because we can only use what is availableand once they have been used up, thats it!
  31. 31. We have already found ways to tap into the energyof the sun, wind, waves and water, amongst otherthings.These sources of energy produce only very smallamounts of greenhouse gas once operating, if any atall - now thats clean!They are also renewable which means they can beused over and over again.
  32. 32. There are many forms of renewable energy . Most of theserenewable energies depend in one way or another on sunlight. Windand hydroelectric power are the direct result of differential heating ofthe Earths surface which leads to air moving about (wind) andprecipitation forming as the air is lifted. Solar energy is the directconversion of sunlight using panels or collectors.Biomass energy is stored sunlight contained in plants. Otherrenewable energies that do not depend on sunlight are geothermalenergy, which is a result of radioactive decay in the crust combinedwith the original heat of accreting the Earth, and tidal energy, which isa conversion of gravitational energy.
  33. 33. The main and primary reason for using clean energiesis because we need to stop the greenhouse gasemitting. It affects the planet earth with the globalwarming that in this last 60 years have beenincreasing too fast.ADVANTAGES OF RENEWABLE ENERGY
  34. 34. USA is already using “Clean Energy” and these arethe results:Arkansas’ Clean Energy Resource Potential, EnergyAdvantages, and Environmental Benefits
  35. 35. Developing and deploying new low-carbon and zero-carbon technologiesResearch into and development of the next generation of low-carbon technologies will be critical to deep mid-century reductions inglobal emissions.Current research on battery technology, new materials for solar cells, harnessing energy from novel sources like bacteriaand algae, and other innovative areas could provide important breakthroughs.
  36. 36. The world is temporarily affected by hot and cold climateperiods. The industrial revolution which started in 1875changed weather conditions. The world has a tendencyto warm up.The industrialization and the increasing populationdensity are forcing governments to consume more fossilfuels and are affecting the artificial greenhouse gasesfluctuation.Even if the usage of fossil fuels could beprohibited, greenhouse gases extant in the atmosphereare going to remain for hundred years.The emission of greenhouse gases cant be stopped, butsome precautions must be taken.CONCLUSION:
  37. 37. Bibliography