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davido T

Despite lower carbon dioxide emissions, diesel cars may promote more global warming tha... - 0 views

www.stanford.edu/...jacobsonJGR1023.html

fossil-fuel g810--research_project--lit_review ghg particulates--co2 particulates--pm

shared by davido T on 06 Dec 07 - Cached
  • The state of California is implementing an even more restrictive standard in 2004, allowing only 0.006 grams per kilometer [0.01 grams per mile] of particulate emissions.
  • Even if the California standard were introduced worldwide, says Jacobson, diesel cars may still warm the climate more than gasoline cars over 13 to 54 years.
  • Jacobson says that new particle traps being introduced by some European automobile manufacturers in their diesel cars appear to reduce black carbon emissions to 0.003 grams per kilometer [0.005 grams per mile], even below the California standard.
  • ...4 more annotations...
  • But, he says, "diesel vehicles emitting at this level may still warm the climate more than gasoline over a 10 to 50 year period, not only because of black carbon emissions, but also because the traps themselves require addition fuel use.
  • Gasoline/battery hybrid vehicles now available not only get better mileage than the newest diesels but also emit less black carbon."
  • In practice, less than 0.1 percent of light vehicles in the United States run on diesel fuel, whereas more than 25 percent do in Europe. (Almost a third of new European cars in 2000 were diesel powered.)
  • In both the United States and Europe, virtually all heavy trucks and buses are diesel powered, and American diesel consumption rates for all modes of ground transportation combined are about 75 to 80 percent of those in Europe.
    • davido T
      davido T on 06 Dec 07
       
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