Not Surprising

City dwellers emit less carbon than country folk.

"The real climate change culprits are not the cities themselves but the high consumption lifestyles of people living across these wealthy countries," said report author David Dodman.

He analyzed the per capita emissions from major cities in Europe, Asia, North America and South America.

According to the report, London emitted 44.3 million tons of CO2 in 2006, or 8 percent of the national total.

With a population of around 7 million, per capita emissions in London were only 6.18 tons per person, or 55 percent of the UK's 2004 average of 11.19 tons.

In the United States, New York City had emissions of 58.3 million tons in 2005, or around 7.1 tons per person. U.S. per capita levels were more than triple at 23.92 tons in 2004.