BBC NEWS | Asia-Pacific | China 'now top carbon polluter'China has already overtaken the US as the world's "biggest polluter", a report to be published next month says. The research suggests the country's greenhouse gas emissions have been underestimated, and probably passed those of the US in 2006-2007. The University of California team will report their work in the Journal of Environment Economics and Management. They warn that unchecked future growth
