Perpetuum Mobile
Perpetuum Mobile
You cannot have failed to notice that when it comes to environmental issues, aviation has been forced to be on the defensive for many years now. While the actual contribution of aviation to the total amount of emissions of all kinds and from all sources is less than 7%, the treatment aviation gets is out of all proportions.
from: http://ezinearticles.com/?Perpetuum-Mobile&id=3654879
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