Looks like carbon dioxide is officially a pollutant whether there is any scientific basis for it or not. The decision is a legal one and not a scientific finding:
Carbon Pollution Regulation in U.S. Moving Ahead With EPA Rules
June 20 (Bloomberg) -- The U.S. Environmental Protection Agency, after seven years of declining to regulate carbon- dioxide emissions under President George W. Bush, is taking its first steps to control the main gas blamed for global warming.
Ordered to act by the U.S. Supreme Court, the EPA will begin developing limits on greenhouse gases emitted by power plants, vehicles and large manufacturers. In April 2007, the U.S. high court ruled that carbon dioxide is a pollutant subject to government regulation.
Next week, the EPA will formally seek public and industry comment on how the U.S. should respond to the court ruling, the first step in developing new rules, agency spokesman Timothy Lyons said in a June 17 interview. While new gas limits aren't likely to emerge during the Bush administration, utility and refinery lobbyists say they see the EPA action as a prelude to setting caps on carbon emissions.
Here is a link to the rest of the story:
http://www.bloomberg.com/apps/news?pid=newsarchive&sid=aC6ZsNPgGW7k