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Biofuels, Biodiesel and Ethanol - The New York Times - 0 views

shared by osikatho97 on 13 Mar 12 - No Cached

In the early days of motorized transport, fuels derived from plants lost out to fuels refined from crude oil
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first-generation biofuels -- chiefly, ethanol made from corn or sugar cane, or biodiesel made from vegetable oil
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The source plants absorb carbon dioxide from the air as they are growing, and consequently, the carbon dioxide that is released when biofuels are burned does not represent a net addition of that greenhouse gas to the atmosphere.
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second-generation biofuels made from plant wastes
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2 studies conclude that biofuels are not so green after all - The New York Times - 0 views

www.nytimes.com/...07iht-biofuel.5.9849073.html pollution

shared by pettitmat99 on 22 Oct 12 - No Cached

most all biofuels used today cause more greenhouse gas emissions than conventional fuels if the pollution caused by producing these "green" fuels is taken into account, two studies published Thursday have concluded.
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The benefits of biofuels have come under increasing attack in recent months as scientists have evaluated the global environmental cost of their production. The new studies, published by the journal Science, are likely to add to the controversy.
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When you take this into account, most of the biofuel that people are using or planning to use would probably increase greenhouse gasses substantially," sai
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t even that equation proved overly simplistic because the process of turning plants into fuel causes it own emissions - through refining and transport, for example
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If vegetable oil prices go up globally, as they have because of increased demand for biofuel crops, new land is inevitably cleared as farmers in developing countries switch production. Crops from old plantations and fields go to Europe for biofuels, but new fields and plantations are created to feed people at home.
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- pettitmat99 on 22 Oct 12
  
  GR8 info on pollution of biofuels
  
  <div class="cArrow"> </div><div class="cContentInner">GR8 info on pollution of biofuels</div>
  
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ut the new studies suggested that when land use is taken into account few, if any biofuels, will be acceptable.
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d: "If the whole point of biofuels directives was to reduce greenhouse gas emissions, we've found out that most biofuels are not really better than conventional fuels at that."
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