The Guardian has produced a map showing the level of carbon dioxide emitted by nations. China is the biggest offender, followed by the United States. It’s an interactive map with a searchable database. This is just a screen grab:
Tom Paulson is founder and lead journalist at Humanosphere. Prior to operating this online news site, he reported on science, medicine, health policy, aid and development for the Seattle Post-Intelligencer. Contact him at tom[at]humanosphere.org or follow him on Twitter @tompaulson.