Center for American Progress. July 24, 2012.
International aviation generates more than 3 percent of total global greenhouse gas emissions per year. This amount is relatively small but growing quickly, with worldwide aviation emissions projected to increase 300 percent to 700 percent by 2050. Until recently the sector faced no limits on these emissions. But starting this year, 2012, the European Union began regulating emissions from all flights to and from EU airports. Crucially, the European Union law covers both foreign and EU airlines and their emissions produced over their entire flight path, not just over EU airspace. [Note: contains copyrighted material].
http://www.americanprogress.org/issues/2012/07/pdf/aviation_carbon.pdf [PDF format, 23 pages].
The Brookings Institution. January 23, 2012.
With limited progress in the U.N. climate change negotiations, the European Union has been looking at ways to further reduce global CO2 emissions by extending the scope of its cap-and-trade system, most recently through flights entering and leaving EU airspace. The EU Aviation Directive entered into force on January 1st, 2012, requiring all airlines to hold permits covering their CO2 emissions for flights operating in EU airspace. [Note: contains copyrighted material].