Renewable energy

2869 mots 12 pages
Abundant and economical energy is the life blood of modern civilizations, Oil has been dominant in powering almost all machines that move and this makes oil uniquely versatile. Oil powered airplanes carry 500 people across the widest oceans at nearly the speed of sound. Oil powered machines produce and transport food. Oil powered machines are clearly ubiquitous and our dependence on oil as fuel and source of energy cannot be over-emphasized. Clearly, we live in the age of oil, but the age of oil is gradually drawing to a close. Studies have shown that if oil production remains constant until it's gone, there is enough to last 42 years. It was estimated by the Energy Information Administration (EIA) that in 2006 primary sources of energy consisted of petroleum 36.8%, coal 26.6%, natural gas 22.9%, amounting to an 86% share for fossil fuels in primary energy production in the world while non-fossil sources such as hydroelectric 6.3%, nuclear 6.0%, and (geothermal, solar, tide, wind ) accounted for a meager 0.9 percent. Fossil fuels are non-renewable resources because they take millions of years to form, and reserves are being depleted much faster than new ones are being formed. The production and use of fossil fuels raise environmental concerns. The burning of fossil fuels produces around 21.3 billion tonnes (21.3 gigatonnes) of carbon dioxide per year, but it is estimated that natural processes can only absorb about half of that amount, so there is a net increase of 10.65 billion tonnes of atmospheric carbon dioxide per year. This enormous amount, unarguably, is the primary source of greenhouse gases which culminates in global warming. Besides the depletion of oil reserves, combating global warming and other problems associated with fossil fuels, has necessitated a switch to renewable energy sources like Sunlight, Wind, Hydro and Geothermal whose carbon emissions are relatively low compared to present

en relation

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  • Chapitre 4 photosynthese
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  • Energie renouvelable
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  • La fonction d'usage des collèges
    1210 mots | 5 pages
  • Chapitre 2 : le rayonnement solaire
    701 mots | 3 pages
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  • TPE
    2658 mots | 11 pages
  • Rapport de stage bimo
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  • L'enjeu énergétique mondial
    943 mots | 4 pages
  • tension
    1073 mots | 5 pages
  • Efficacité énergétique dans le bâtiment
    5125 mots | 21 pages
  • Transparency in oil pricing
    4648 mots | 19 pages
  • Exercices corrigés exo de commerce
    1924 mots | 8 pages