GAINESVILLE, Fla. — President-elect Donald Trump has not minced words about his approach to environment and energy policy: He loathes regulation and wants to increase the use of coal, offshore drilling and fracking.

Trump has said he believes climate change is a hoax and that he would “cancel” U.S. involvement in the landmark Paris Agreement on global warming.

While he has been vague about precise policies, Trump’s election likely means trouble for some of President Barack Obama’s signature environmental initiatives, environmentalists and policy analysts say.

They say it’s probable that Trump’s administration will seek to weaken or kill the Clean Power Plan, a cornerstone Obama policy meant to reduce carbon pollution from the nation’s power plants as part of an effort to combat climate change.

The Clean Power Plan is being challenged in federal court, and if it survives, Trump could move to scuttle it. But not without a fight.

“We don’t consider the CPP dead. We have many tools to help preserve it,” said David Goldston, director of government affairs for the Natural Resources Defense Council. “He can’t just snap his fingers and wish away regulations. There’d be a backlash, which would make Congress think twice.”

Any move to back out of the Clean Power Plan or the Paris Agreement could be extremely unpopular moves, environmentalists argue. Polls have shown a majority of voters in at least two states believe global warming is a serious problem.

An exit poll found that about half of Trump voters in Florida, a state he carried, agreed that climate change was a serious problem. In Maine, just over half of Trump supporters also agreed, while about four in 10 disagreed.

Trump also has vowed to tap into America’s coal reserves in an effort to put the shrinking energy sector back to work. In a speech in the Bakken shale fields of North Dakota, he also said he would increase hydraulic fracturing, or fracking, in the nation’s shale and natural gas reserves to further remove any dependence on foreign energy sources.

Industry advocates are buoyed by the possibilities presented by Trump’s win.

“We look forward to working with the new administration” on issues such as opening more public land and offshore areas to oil and gas drilling, building more energy infrastructure and reducing environmental regulations, American Petroleum Institute President Jack Gerard said Thursday. He would not say whether he supported a U.S. withdrawal from the Paris climate agreement.

Likewise, the coal industry believes Trump “understands the urgent need to rein in the Washington bureaucracy and sweeping, excessive regulations” to protect coal jobs in an industry where sharply falling demand for coal has led to permanent plant closures, the American Coal Council said.

“The coal sector has been devastated by lower demand and job loss in recent years due to the mounting impact of regulations pointed squarely at our industry,” American Coal Council CEO Betsy Monseu said.

Some question whether it would make economic sense for the U.S. to attempt to increase the use of coal, a fuel being phased out of the energy picture due to its pollution and falling prices of renewables such as solar and wind.

“Coal is not coming back,” said Michael Brune, Sierra Club executive director. “Ask investors on Wall Street, or regulators at the state and local level who are choosing solar and wind because of basic economics.”