Oregon’s effort to reduce its greenhouse gas emissions through state policies could face challenges from the White House after President Donald Trump signed an executive order barring state and local enforcement of climate laws that target the use of fossil fuels.

But Gov. Tina Kotek said Oregon won’t back down.

Kotek said her administration is committed to continuing to implement the state’s climate action laws and the renewable energy transition, and to helping lower energy bills for low-income Oregonians.

“Combating climate change requires collaboration and long-term work — not deregulating polluters,” she said in a statement. “The science is clear. Climate change is real and our state programs are critical to protecting our environment for generations to come. I will continue to fight for the longstanding values of Oregonians.”

Trump’s executive order, Protecting American Energy from State Overreach, authorized U.S. Attorney General Pam Bondi to take “all appropriate action to stop the enforcement” against state and local laws “purporting to address climate change or involving environmental, social, and governance initiatives, environmental justice, carbon or greenhouse gas emissions, and funds to collect carbon penalties or carbon taxes.”

The Trump administration called these laws unconstitutional and said they go against his administration’s commitment of “unleashing American energy” through increased use of fossil fuels like oil and natural gas.

“American energy dominance is threatened when State and local governments seek to regulate energy beyond their constitutional or statutory authorities,” Trump said in the executive order.

Climate action laws like the Inflation Reduction Act and the Bipartisan Infrastructure Law, which were passed by Congress during the Biden administration, have provided hundreds of billions of dollars aimed at reducing carbon emissions from various sectors while boosting renewable energy. They have been a target of the Trump administration since Day 1.

Oregon’s Climate Protection Program, which seeks to reduce 90% of carbon emissions from diesel, gasoline and natural gas companies by 2050, could be in jeopardy. So could the Oregon Clean Fuels Program. The state’s 100% renewable energy law could also be at risk.

The Climate Protection Program is currently undergoing a second rulemaking process after a state Court of Appeals invalidated the program in December 2023 due to procedural technicalities.

Related: Trump’s new energy order puts states’ climate laws in the crosshairs of the Department of Justice

Under the executive order, Bondi is directed to take “all appropriate action to stop the enforcement of State laws and continuation of civil actions.” Bondi will have 60 days to report to the Trump administration which laws it acted against and, if further action would be necessary, to “stop the enforcement.”

The executive order specifically called out California’s Cap-and-Trade carbon program, and New York and Vermont’s Climate Superfund laws that hold fossil fuel companies accountable for their contribution to climate change. Oregon lawmakers held a hearing on Wednesday for a similar law in Oregon, Senate Bill 1187, and they are currently accepting public comment.

The executive order also called out states that have sued oil companies “for supposed climate change harm under nuisance or other tort regimes that could result in crippling damages.” That could include Multnomah County’s lawsuit filed two years ago against more than a dozen fossil fuel companies over the heat dome event, which scientists said was extremely rare and made worse through climate change.

But legal experts say the executive order is vague and lacks clear direction from the administration on how it intends to challenge these laws. That could lead to a number of lawsuits.

Meredith Connolly, Oregon-based director of policy and strategy at nonprofit advocacy group Climate Solutions, said the executive order could target almost all laws that focus on climate, renewable energy and environmental justice that any city or county in Oregon have passed “even if there isn’t a constitutional or legal basis for it.”

Connolly said the executive order is “blatantly unconstitutional” that aims to take away states’ right to protect their residents.