The Paris Agreement was and is a dead letter with or without American participation in it, and Trump's withdrawal from it will do no harm.
The global climate agenda has corrupted three international institutions and turned them away from their original missions.
The Paris Accords are supposed to be a form of climate insurance, but the threat is nonexistent and the premiums are far too high.
Review of Landing the Paris Climate Agreement - How It Happened, Why It Matters, and What Comes Next, by Todd Stern.