If the US stays in the Paris deal but misses its targets, the deal could look like a sham. But if Trump carries out his threat to withdraw, the US veto would be gone, and other nations might step up.
Former Colorado Gov. Bill Ritter, now leading a clean energy research center at Colorado State University, explains why clean energy will keep growing despite President Trump's focus on fossil fuel.
Donald Trump has signalled the end of US leadership on climate policy, with potentially unpleasant consequences for America's economy, security and diplomatic standing.
Oklahoma Attorney General Scott Pruitt has sued the federal government repeatedly. If he becomes head of EPA and tries to weaken environmental laws, opponents are likely to do the same to him.
The 'war on coal' is not really a result of onerous regulations but a combination of market forces over which a Trump administration has limited control.
Hillary Clinton's energy and climate platform emphasizes renewable energy and the health benefits of the plan -- a position that will resonate with many voters.
Despite looming legal challenges, states are devising plans to comply with limits on power plant carbon emissions – a crucial part of Obama's climate policies.