President-elect Donald Trump has vowed to scrap U.S. involvement in the Paris climate accords, undo President Obama’s signature piece of domestic environmental legislation — the Clean Power Plan — and eviscerate the Environmental Protection Agency. These moves would effectively decimate what Obama considers one of his greatest achievements — his efforts to slow global warming. But are Trump’s threats just campaign rhetoric? How far could the new president actually go in reversing the accomplishments of the Obama years? Seven experts weigh in.