Clinton or Sanders would likely build on the new limits to regulate existing plants.
Oil-and-gas producers have a financial incentive to make sure methane isn't leaking from wells and pipelines. Yet methane has become a well-documented problem--and once it joins the atmosphere, scientists will tell you, it becomes a potent greenhouse gas, responsible for a quarter of the Earth's ext...
02:33 Executive Actions Ready To Go As Trump Prepares To Take Office11
02:12 A Trump Administration, With Obama Staff Members Filling In the Gaps16
23:16 After oath, Trump faces ambitious Day 1 to-do list13
10:19 Kremlin hits out at Obama, says was always ready for nuclear arms cuts15