Washington CNN  — 

Sen. Ted Cruz has “rendered himself absolutely unfit to be running for office” – let alone president – by insisting that humans aren’t to blame for global warming, California Gov. Jerry Brown says.

Brown, a Democrat, took aim at Cruz during a Sunday appearance on NBC’s “Meet the Press,” the day before Cruz is expected to announce his bid for the 2016 Republican presidential nomination during a speech at Liberty University in Virginia.

READ: Cruz to announce 2016 bid on Monday

He blasted Cruz’s comment during a late-night television appearance that climate change “alarmists” have a problem.

“The science doesn’t back them up,” Cruz had said on NBC’s “Late Night with Seth Meyers.”

Brown accused Cruz of “such a level of ignorance and a direct falsification” of scientific evidence in deeming him unfit. He was discussing a drought that has left some regions of California woefully short on water headed into the summer.

“What he said is absolutely false,” Brown said. “Over 90% of the scientists who deal with climate are absolutely convinced that the humans’ activity, industrial activity … are building up in the atmosphere, they’re heat trapping, and they’re causing not just one drought in California but severe storms and cold on the East Coast.”