Climate stand-off: U.S. versus China

The NY Times reports on the heavyweight battle, comparing it to "cold-war arms control negotiations".

As a measure of how far apart the two nations are, China says the United States should reduce its greenhouse gas emissions by 40 percent below 1990 levels by 2020. The bill before Congress, which could be further weakened, now calls for less than a 4 percent reduction over that period.