California Gov. Jerry Brown (D) says California is “ready to fight” President-elect Donald Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE on climate change.

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"We've got the scientists, we've got the lawyers and we're ready to fight," Brown said during a heated speech Wednesday night to the American Geophysical Union in San Francisco, the Los Angeles Times reported.

Brown seized on comments from a top Trump adviser, who said the incoming administration plans to eliminate NASA's earth science programs. That would end the use of satellites to gather climate information.

"If Trump turns off the satellites, California will launch its own damn satellite," Brown said.

The Democrat, who is collectively the longest-serving governor in California history, is a staunch Trump opponent. Brown has attempted to run for the Democratic presidential nomination and a Senate seat in the past.

Brown also jabbed the home state of former Texas Gov. Rick Perry (R), Trump's choice to lead the Energy Department.

"We've got more sun than you've got oil," Brown said, referring to renewable energy.