China Joins U.S. Among Biggest Global Warming ‘Offenders’

China, India and Brazil, three of the largest developing nations, joined the U.S. in a list of the biggest historical contributors to global warming, according to a study by researchers in Canada.

Seven nations between them accounted for more than 60 percent of all heat-trapping gas emissions between 1750 and 2005, researchers at Concordia University, Montreal, said today in a statement. Russia, the U.K. and Germany rounded out the list.