US EPA has announced final endangerment findings on GHGs concluding that these threaten public health and welfare of American people. Findings cover CO2, CH4, N2O, HFCs, PFCs and SF6 - subject of scrutiny & analysis for decades by scientists.

This report finds that the current and projected concentrations of the six key well-mixed greenhouse gases--carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), and sulfur hexafluoride (SF6)--in the atmosphere threaten the public health and welfare of current and future generations.

See Also:

Opinion: US' climate move too little too late - Sunita Narain.
http://www.ndtv.com/news/videos/video_player.php?id=1183030

Report: Endangerment findings for GHG under section 202(a) of Clean Air Act.
www.indiaenvironmentportal.org.in/node/293230

Report: LMV GHG & corporate average fuel economy standards.
http://www.epa.gov/oms/climate/regulations.htm

Feature: Public health benefits of strategies to reduce GHG emissions.
www.indiaenvironmentportal.org.in/node/293140

Report: GHG emissions in US, 2008.
www.indiaenvironmentportal.org.in/node/293115