After four years of U.S. progress on efforts to deal with climate change under Joe Biden, Donald Trump's return to the White House is swiftly swinging the pendulum in the opposite direction.

From national security to home insurance, the president has quickly changed America’s climate adaptation policies in important ways.

The move announced Monday is a blow to worldwide efforts to combat global warming and distances the nation from its closest allies.

Donald Trump's team made quick work of taking down web pages about the founding documents and information about former U.S. presidents.

On his first day in office, President Donald Trump is expected to turn away from former President Joe Biden's environmental policies with a suite of new priorities.

Under the national border emergency declaration, the Trump administration intends to use the U.S. military to crack down on illegal immigration, combat transnational gangs and drug trafficking and execute his promised mass deportations of undocumented migrants.

There are 50 to 100 expected executive orders. Many will focus on boosting fossil fuels and reversing climate policy.

Donald Trump has already taken radical new stances on Greenland and the Panama Canal. What do security experts predict he'll do in the Pacific?

• Establish the Department of Government Efficiency under the Executive Office of the President until July 4, 2026. This is the entity led by Elon Musk, the world’s richest man, and is charged with recommending cuts in federal programs and spending.

Within hours of taking office, President Trump declared a national energy emergency as part of his plan to push for more oil and gas drilling and to heavily boost fossil fuels. He also started a process to reverse much of what the Biden administration did on greener energy.

With so much federal backtracking already underway, all eyes now turn toward states like ours to lead the effort against climate change.