This report compares on an equal basis the vehicle standards that have recently been put in place, updated or proposed by governments around the world to address these two policy goals. Japan and Europe currently lead, and will continue to lead, the world in controlling GHG emissions and fuel consumption from passenger vehicles, partly due to fuel and vehicle taxation policies that favor more efficient vehicles. In terms of absolute improvement, California and Canada are posed to make the largest gains in the next decade, provided that legal and technical barriers to implementing and enforcing their standards can be overcome.

URL: http://www.theicct.org/documents/ICCT_GlobalStandards_2007.pdf