Sen. Bernie Sanders Bernie SandersOutrage erupts over Breonna Taylor grand jury ruling Dimon: Wealth tax 'almost impossible to do' Grand jury charges no officers in Breonna Taylor death MORE (I-Vt.) on Saturday slammed President 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 for once saying that the noise from wind turbines causes cancer, describing Trump as a "profound scientist" for making that claim.

"As I’m sure you’re all aware, Trump and I have a few differences of opinion," Sanders, a 2020 Democratic presidential candidate, said while campaigning in Ames, Iowa, according to KCCI 8, a local CBS affiliate. "But maybe the most profound difference is that Trump is maintaining the myth that climate change is a hoax."

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Sanders added that Trump is "working overtime to make sure that we have more carbon emissions," before noting that the president made a "profound remark" in regards to wind turbines causing cancer.

"And he’s a profound scientist, someone who’s researched the issue for years and uniquely came up with that conclusion," Sanders said.

Trump in early April floated the claim that the noise wind turbines emit causes cancer while speaking at the National Republican Congressional Committee's annual spring dinner.

“If you have a windmill anywhere near your house, congratulations, your house just went down 75 percent in value. And they say the noise causes cancer,” Trump said.

There is no evidence to back Trump's claim that noise from wind turbines may cause cancer.

Both of Iowa's GOP senators criticized Trump's statement, with Sen. Chuck Grassley Charles (Chuck) Ernest GrassleyThe Hill's 12:30 Report: Ginsburg lies in repose Top GOP senators say Hunter Biden's work 'cast a shadow' over Obama Ukraine policy Read: Senate GOP's controversial Biden report MORE (R-Iowa) saying that the president's comments on wind power were "idiotic."

"I have church bells that ring across from my office here in D.C. I know that noise doesn't give me cancer, otherwise I'm sure I'd have church bell cancer," Sen. Joni Ernst Joni Kay ErnstThe Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Liberal super PAC launches ads targeting vulnerable GOP senators over SCOTUS fight Romney backs pre-election Supreme Court vote, paving way for McConnell, Trump MORE (R-Iowa) said, according to a Des Moines, Iowa NBC affiliate.

Trump has repeatedly voiced critical comments about wind power. He said at a rally in Michigan earlier this year that the power source was unreliable because the wind doesn't always blow.