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...
Also read: Trump Set to Roll Back Obama-Era Contraception Rule
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