Earth day

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Earth day

  1. 1. Briefly introductionBriefly introduction It took the steely determinationIt took the steely determination and perseverance of oneand perseverance of one individual to arouse and uniteindividual to arouse and unite the passions of nearly 20the passions of nearly 20 million Americans thatmillion Americans that culminated into the creation ofculminated into the creation of Earth Day. More importantly, itEarth Day. More importantly, it finally put the need to urgentlyfinally put the need to urgently harness and limitharness and limit environmental decadence,environmental decadence, before things reachedbefore things reached irreversible extents.irreversible extents.
  2. 2. The Earth’s Day “Prophet”The Earth’s Day “Prophet” Gaylord Nelson, (June 4, 1916 – July 3, 2005) Senator ofGaylord Nelson, (June 4, 1916 – July 3, 2005) Senator of Wisconsin, is the principal founder of Earth Day. HeWisconsin, is the principal founder of Earth Day. He managed to rip off the blindfolds of politicians, forcing themmanaged to rip off the blindfolds of politicians, forcing them to see how the earth was needed immediate help toto see how the earth was needed immediate help to recuperate after being made subject to industrial raperecuperate after being made subject to industrial rape
  3. 3. 11stst demonstrationdemonstration The first demonstration tookThe first demonstration took place on April 22, 1970,place on April 22, 1970, sponsored by Senatorsponsored by Senator Gaylord Nelson andGaylord Nelson and environmental activist, toenvironmental activist, to create an environmentalcreate an environmental agency. In this competitionagency. In this competition there were two thousandthere were two thousand universities, ten thousanduniversities, ten thousand primary and secondaryprimary and secondary schools, and hundreds ofschools, and hundreds of communities. Socialcommunities. Social pressure had itspressure had its achievements and the U.S.achievements and the U.S. government created thegovernment created the Environmental ProtectionEnvironmental Protection Agency (EPA) and a seriesAgency (EPA) and a series of laws designed to protectof laws designed to protect
  4. 4. Earth SummitEarth Summit In 1972, it was held the firstIn 1972, it was held the first international conference oninternational conference on the environment: the Earththe environment: the Earth Summit in Stockholm, whichSummit in Stockholm, which aimed to raise awarenessaimed to raise awareness among world leaders on theamong world leaders on the magnitude of environmentalmagnitude of environmental problems. So this day isproblems. So this day is celebrated world wide.celebrated world wide.
  5. 5. Only one day?Only one day? Shouldn’t it be all theShouldn’t it be all the year? Advances inyear? Advances in technologytechnology nowadays arenowadays are trying to get ourtrying to get our necessitiesnecessities satisfied, butsatisfied, but without harming thewithout harming the environment.environment.
  6. 6. RENEWABLE ENERGYRENEWABLE ENERGY Renewable energy is an energy which comesRenewable energy is an energy which comes from natural resources suchfrom natural resources such as sunlight, wind, rain, tides, and geothermal heat.as sunlight, wind, rain, tides, and geothermal heat.
  7. 7. Wind PowerWind Power Wind power is theWind power is the conversion of wind intoconversion of wind into a useful form of energya useful form of energy..
  8. 8. Example:Example:
  9. 9. HydropowerHydropower Hydropower or waterHydropower or water power is power derivedpower is power derived from the energy offrom the energy of falling water.falling water.
  10. 10. Example:Example:
  11. 11. Solar energySolar energy Solar energy is the energy the sunSolar energy is the energy the sun creates, which can be transformedcreates, which can be transformed into a useful form of energy.into a useful form of energy. There are two types: Photovoltaic (PV)There are two types: Photovoltaic (PV) and Solar thermal energy (STE).and Solar thermal energy (STE).
  12. 12. Photovoltaic (PV)Photovoltaic (PV) Photovoltaic is a method forPhotovoltaic is a method for generating electric powergenerating electric power by using solar cells toby using solar cells to convert energy from theconvert energy from the sun into a flow of electrons.sun into a flow of electrons. Photovoltaic powerPhotovoltaic power generation employs solargeneration employs solar panels composed of apanels composed of a number of solar cells.number of solar cells. The first practical applicationThe first practical application of photovoltaic was toof photovoltaic was to power orbiting satellitespower orbiting satellites and other spacecraft.and other spacecraft.
  13. 13. Solar thermal energy (STE)Solar thermal energy (STE) Solar thermal energy is aSolar thermal energy is a technology for transformingtechnology for transforming solar energy into thermalsolar energy into thermal energy (heat).energy (heat).
  14. 14. Geothermal energyGeothermal energy Geothermal energy is heat fromGeothermal energy is heat from within the Earth. We canwithin the Earth. We can recover this heat as steam orrecover this heat as steam or hot water and use it to heathot water and use it to heat buildings or generatebuildings or generate electricity.electricity. Naturally occurring areas ofNaturally occurring areas of hydrothermal resources arehydrothermal resources are called geothermalcalled geothermal reservoirs. Most of them arereservoirs. Most of them are deep underground with nodeep underground with no visible clues showing abovevisible clues showing above ground.ground.
  15. 15. Example:Example: Volcanoes and fumaroles, hot springs and geysers.Volcanoes and fumaroles, hot springs and geysers.
  16. 16. Biomass energyBiomass energy Biomass is organic materialBiomass is organic material made from plants andmade from plants and animals (microorganisms).animals (microorganisms). Biomass contains storedBiomass contains stored energy from the sun thatenergy from the sun that can be converted to othercan be converted to other useable forms of energy,useable forms of energy, such as methane gas orsuch as methane gas or transportation fuels.transportation fuels.
  17. 17. Example:Example:
  18. 18. EnvironmentalEnvironmental friendly technologyfriendly technology Technology is one of the things that helps us, but at theTechnology is one of the things that helps us, but at the same time one which affects most the environment. Sosame time one which affects most the environment. So Inventors don’t waste time putting their ideas in theInventors don’t waste time putting their ideas in the service of the planet, taking them from imagination toservice of the planet, taking them from imagination to reality. Green inventions were born to change our livesreality. Green inventions were born to change our lives and save our environment. This are a class of electronicand save our environment. This are a class of electronic devices that can promote sustainable management ofdevices that can promote sustainable management of resources, which means to contribute to theresources, which means to contribute to the environmental sustainability.environmental sustainability.

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