Environmental groups and scientists are gripped with anxiety about the prospect of President-elect Donald Trump, who has denied the existence of climate change, slashing government money for climate research, gutting the U.S. Environmental Protection Agency’s staffing and authority, and pulling out from international agreements to curb greenhouse-gas emissions. On the other end, skeptics of climate change and those who believe the Obama administration has wrongly prioritized efforts to curb global warming at the expense of the U.S. economy are eyeing Trump’s presidential victory as a chance to give their views high-profile credence.