Repealing the Obama climate rules would only effect temperatures 1/100th of a degree Celsius

See The Climate Yawns: Donald Trump is no more a planet wrecker than Barack Obama (as measured to the third decimal) by Holman W. Jenkins Jr. Excerpts:

"So potent and large are these global forces that repealing the Obama rules, costly as they are, not only won’t affect coal jobs, it won’t affect climate. 

Gina McCarthy, Mr. Obama’s EPA administrator, admitted as much when confronted, during a 2015 House hearing, with the fact that, by the agency’s own climate models, the effect would be only 1/100th of a degree Celsius. Instead, she said success should be measured in terms of “positioning the U.S. for leadership in an international discussion.”

Even so, many climate activists felt the need to walk back Ms. McCarthy’s concession by insisting Obama policies would have a measurable effect—on the amount of CO ₂ released. Yes, the relative decrease would be tiny but measurable, though the climate effect would be zip. This is akin to medical researchers claiming a drug a success because it’s detectable in the bloodstream, not because it improves health."

"Pile up all the government policies enacted or seriously on the table, and their net effect is zilch. A new McKinsey study, that would be hilarious if it weren’t so sad, points out that Germany’s switch to renewables has been a success by almost every metric except CO ₂ output—which is up instead of down.

Rising energy prices to support this energy transition have had one measurable effect—more than 330,000 German households have had their electricity shut off in the past year from nonpayment of bills almost three times as high as those paid by U.S. households."