After a thorough scientific review ordered in 2007 by the U.S. Supreme Court, the Environmental Protection Agency issued a proposed finding April 17 that greenhouse gases contribute to air pollution that may endanger public health or welfare.
The proposed finding, which now moves to a public comment period, identified six greenhouse gases that pose a potential threat.
To read article, go to Environmental Protection Agency.
The Office of Water for the US EPA also issued their progress report for implementing the National Water Program Strategy in response to climate change in January for the year of 2008. To view the report, go to EPA.