Washington-The U.S. Environmental Protection Agency said Dec. 7 that after a thorough examination of scientific evidence and careful consideration of public comments, it has determined that greenhouse gases (GHGs) threaten the public health and welfare of the American people. It also found that GHG emissions from on-road vehicles contribute to the threat. EPA said the findings continue its work towards clean energy reform that will cut GHGs and reduce the dependence on foreign oil. The proposed findings were released in April 2009 and a 60-day public comment period was held, with some 380,000 comments received. The findings are expected to open the door to more broad-ranging government limitations on GHGs.