04/17/2009 - The US government is to regulate carbon dioxide emissions, having decided that it and five other greenhouse gases may endanger human health and well-being.
The Environmental Protection Agency (EPA) announced the move following a review of the scientific evidence.
"This reclaims the US role on the international stage as a leader," said Phyllis Cuttino, director of the US global warming programme at the Pew Environment Group in Washington DC.
"The EPA's next step will probably be to grant the 'California waiver', which would allow states to restrict tailpipe emissions, and that we expect to happen very soon," she told BBC News.
Read the full article Obama to Regulate 'Pollutant' CO2 on the BBC's Web site.
Pew is no longer active in this line of work, but for more information, visit the main Pew Campaign on Global Warming page.