Whats this 'we know' crap, you got a mouse in your pocket boy?
This is what happens when politicians and 'experts' get involved they make money.
Environmentally conscious travelers flying out of San Francisco International Airport will soon be able to assuage their guilt and minimize the impact of their air travel by buying certified carbon offsets at airport kiosks. ...
http://www.sfgate.com/cgi-bin/articl...DTL&type=green
Just one big guilt trip that keeps people shelling out cash, changes nothing, life goes on and so does the planet. It's bigger than you think.