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President Trump's decision to withdraw from the Paris climate agreement has taken the uncertainty surrounding U.S. climate policy to a whole new level. 

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Kicking Off Fuel Economy Rule Process, NHTSA Weighs Changes To MY21

The National Highway Traffic Safety Administration (NHTSA) says it is considering whether to reassess the stringency of its final fuel economy standards for model year 2021, a move that could expand the scope of an ongoing “mid-term review” of MY22-25 efficiency standards for four subsequent years and related EPA greenhouse gas limits.

A new “price ceiling” for greenhouse gas allowances in California's just-enacted post-2020 GHG cap-and-trade market risks loosening the program's hard limit on emissions, but one environmentalist notes that the program requires state air regulators to mitigate any higher emissions caused by the price ceiling by securing “outside-the-cap” GHG cuts.

Republican support for the landmark extension of California's greenhouse gas cap-and-trade program -- which was key to extending the program by a two-thirds vote of the state legislature -- is the latest evidence that bipartisan support is critical for the long-term durability of climate mitigation policies, according to one top analyst.

Jeffrey Clark, the Trump administration's pick to head the Department of Justice's (DOJ) environment division, is offering general assurances to senators that he will “vigorously enforce federal law,” while at the same time cooperating with states on environmental enforcement.