Undoing most existing U.S. programs that curb car pollution and other climate-changing emissions would probably take years and court battles if Trump tries, climate experts say. A few efforts, such as a reduction on methane emissions introduced by the Obama administration, could be overturned more easily. That's not far from former President Barack Obama's goals for a reduction of 25 to 28 percent as part of the Paris accord, Perciasepe said. The support from local governments, public institutions and businesses show that climate change efforts are getting something they have long lacked in the U.S. — vocal and enthusiastic support, said William K. Reilly, a former chief of the U.S. Environmental Protection Agency, who is not involved in the alliances. "It does perhaps reflect an increasing activism on the part of the public at large" on climate change, Reilly said.

Source: ABC News June 07, 2017 07:52 UTC