alaskaflyer
Final Approach
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Alaskaflyer
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http://www.csmonitor.com/2007/0817/p01s01-woeu.html
http://www.csmonitor.com/2007/0817/p01s01-woeu.html
The statistics look ominous. Aviation currently contributes about 3 percent of global carbon emissions, but air travel is growing at some 5 percent a year, meaning numbers of air passenger kilometers will triple by 2030. Boeing estimates that aircraft numbers will double to more than 30,000 in little more than a decade.
Added to this is the complication that aircraft do not just give off carbon dioxide but nitrous oxide, thought to have at least double the impact of CO2, and condensation trails, which also may contribute to global warming.
For some, including President Bush's senior environmental adviser James Connaughton, the answer lies chiefly with technology. Aircraft manufacturers are constantly improving design of bodywork and engines, deriving greater fuel efficiency that reduces carbon emissions.