"Comparison of Passenger Vehicle Fuel Economy and Greenhouse Gas Standards Around the World" . The paper describes the fuel economy and GHG standards of nine major regions around the world and compares their relative stringency. Regions examined include: the United States, California, the European Union, Japan, China, Canada, Australia, Taiwan and South Korea. Pew Center on global CC, 2005
Green skies network An NGO based in the UK working on environmental problems of air travel, including climate change. Report "Myths of Flying" available. (Go to reports and publications)