California sues Trump over repeal of EPA’s authority to fight climate change

California, along with a coalition of 23 other states and a dozen cities and counties, sued the U.S. Environmental Protection Agency on Thursday for rolling back the scientific finding requiring it to regulate greenhouse gas pollution.

“This isn’t a small technical change,” California Attorney General Rob Bonta said at a press conference in Sacramento. “It’s a sweeping decision that would increase pollution, worsen climate change and put the health of millions of Americans at risk. And it’s not based on any credible science.”

The lawsuit, filed in the U.S. District Court of Appeals for the District of Columbia, seeks to reinstate a 2009 conclusion known as the endangerment finding — that carbon dioxide and other planet-warming gases threaten public health and welfare.

The climate rule served as the scientific basis for the agency’s ability to limit emissions under the Clean Air Act.

The Trump administration finalized the repeal of the endangerment finding Feb. 12. A post on the EPA’s website stated the change would also dissolve restrictions on vehicle emissions and save Americans $1.3 trillion.

“As a result of these changes, engine and vehicle manufacturers no longer have any future obligations for the measurement, control and reporting of GHG emissions for any highway engine and vehicle, including model years manufactured prior to this final rule.”

Sanchez said California’s authority to regulate greenhouse gas emissions under the landmark 2006 Global Warming Solutions Act, AB 32, signed into law by then-Republican Gov. Arnold Schwarzenegger, “remains unchanged.”

Los Angeles, San Francisco and Santa Clara counties also were parties to the suit.

KQED’s Laura Klivans contributed to this report.