I recently read an article on the Guardian about the changing distribution of carbon dioxide production by country. Carbon dioxide is among the most closely watched greenhouse gases that potentially leads to global warming. According to the Guardian article China has increased its production of CO2 by about 170% since 1984, which is more than the U.S. and Canada combined. Other important changes mentioned in the article are that England has dropped in its production and that India has moved above Russia to the third rank. The U.S. is second in CO2 production behind China.