Environmental groups on Wednesday petitioned the U.S. Department of Interior to review climate impacts related to the decades-old trans-Alaska pipeline system and develop a plan for a "managed phasedown" of the 1,287-kilometre pipeline, which is Alaska's economic lifeline.
A photo from Joshua Tree National Park shows a Joshua tree seedling. Nick Graver/NPS(LOS ANGELES) One of the natural wonders of the world facing threats from climate change