Donald Trump made energy a pillar of his economic policy, and now the president-elect is poised to unwind President Barack Obama's key climate change initiatives and potentially torpedo an international global warming initiative years in the making.
The change could happen quickly, too, in no small part because of the way the Obama administration advanced much of its own agenda.
Realizing early on that there was little he could accomplish through legislation while Republicans held both houses of Congress, Obama pieced together a large number of initiatives to reduce the country's greenhouse gas emissions and fossil fuel consumption, largely through regulation.
That means Trump can order regulators to stop enforcing the rules by using the same executive authority Obama exercised to set them in motion.
Here are the initiatives Trump has either said he will cancel or is likely to target in light of his promise to increase U.S. oil, gas, and coal production: