Actor Harrison Ford was full of righteous indignation as he growled and seethed at those who "don't believe in science" during a speech Thursday on climate change.

No longer resembling the brash, wisecracking Han Solo he portrayed in "Star Wars" during his younger years, the 76-year-old — sporting a full white beard and gray hair — appeared to take on the persona of an Old Testament prophet behind the podium at the Global Climate Action Summit in San Francisco.

'We know who they are!'

"Stop giving power to people who don’t believe in science, or worse than that, pretend they don’t believe in science for their own self-interest,” Ford growled at the crowd. “They know who they are! We know who they are!”

As a preacher would giving an impassioned sermon, the actor brought down the volume a bit to dramatically emphasize that whether one is “rich or poor, powerful or powerless, we will all suffer the effects of climate change and ecosystem destruction, and we are facing what is quickly becoming the greatest moral crisis of our time — that those least responsible will bear the greatest costs."

Ford also warned there's “a risk if we don’t change the path that we’re on today, the future of humanity is at stake."

And perhaps in case some weren't crystal clear on his points, he noted to the crowd that "we are s**t out of time,” the Huffington Post reported.

(H/T: Washington Times)