As reported by Jane Kay, at the San Francisco Chronicle, “Air travel contributes to global warming, and the U.S. Environmental Protection Agency should curb carbon dioxide and other greenhouse gases emitted from airplanes, according to petitions expected to be filed today by California, four other states and three environmental groups.California Attorney General Jerry Brown and the other petitioners want the EPA to start imposing tough limits on plane emissions within six months. The federal government now does not regulate greenhouse gas emissions from aircraft or any other vehicles, including cars and trucks.” Read more>>