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A significant part of the problem with air travel is not just the CO2, CO, various hydrocarbons and particulates emitted, but where they are emitted - the upper atmosphere.

"It is not necessary to have hope in order to persevere."
by ARGeezer (ARGeezer a in a circle eurotrib daught com) on Sat Apr 19th, 2014 at 08:48:57 PM EST
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