"the U.S. pulling out of the Paris global warming pact makes the future seem as fragile and built on hope as a sand castle."
From what I have read this is rubbish.   Even if CO2 was having such an effect, and even if it is caused by fossil fuel burning, the Paris accord would do little.
Everyone was on board because it penalized the US industry and energy production in favor of the rest of the world, in addition to cash payoffs.