Harrison Ford, Image via Flickr / Gage Skidmore.

While speaking at the Field Museum in Chicago Wednesday, legendary actor Harrison Ford issued a blistering attack on President Donald Trump, whom he said was "among the worst criminals in history," according to The Guardian.

In response to what he called Trump's assault on effort to address the climate crisis, Ford, who was at the museum to receive a conservation leadership award, said he is terrified, but noted Trump's dismantling of climate and clean air protections isn't the only thing that has him fearful.

The fact that Trump “doesn’t have any policies, he has whims. It scares the s—— out of me," Ford told The Guardian. "The ignorance, the hubris, the lies, the perfidy. [Trump] knows better, but he’s an instrument of the status quo and he’s making money, hand over fist, while the world goes to hell in a handbasket.”

The 83 year-old "Star Wars" actor is a vocal and long-time environmental activist, leveraging his fame to advocate for conservation and climate action. His involvement includes serving as vice chair of the nonprofit organization Conservation International since 1991.

“It’s unbelievable. I don’t know of a greater criminal in history," Ford said.

The actor, who had to evacuate his home in Los Angeles due to the devastating wildfires earlier this year, said Trump’s notorious aversion to wind turbines is because “he has just not seen a gold one” and that the president’s legacy on the climate crisis would be “a clear expression of ignorance, of hubris and purposeful subterfuge”.

“We are teetering on the edge,” Ford added, regarding the ongoing loss of nature via deforestation, pollution and other human-caused destruction.