Sen. Bernie Sanders Bernie SandersMcConnell accuses Democrats of sowing division by 'downplaying progress' on election security The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters Why Democrats must confront extreme left wing incitement to violence MORE (I-Vt.) slammed President Trump on Saturday, calling on him to pay attention to those taking part in the March for Science and “not the fossil fuel industry and their lobbyists.”

President Trump: Listen to the scientists who are out on the streets, not the fossil fuel industry and their lobbyists. #marchforscience — Bernie Sanders (@SenSanders) April 22, 2017

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Sanders’ tweet came as people in cities around the world rallied as part of the March for Science, calling for climate change policy rooted in scientific evidence and increased federal funding for scientific research.

Trump’s policy proposals on energy have come under heavy fire from Sanders and Democratic lawmakers. His pick to lead the Environmental Protection Agency, Scott Pruitt, was opposed by all but two Senate Democrats during the confirmation process.

Sanders blasted Pruitt’s stance on climate change after his confirmation, calling it “pathetic.”

“You have the head of the Environmental Protection Agency who denies ... reality in face of overwhelming scientific evidence,” he said. “Not only is it sad, it is a real threat to the well-being of this country and the world."

Trump signed an executive order in late March to begin rolling back former President Barack Obama Barack Hussein ObamaThe Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon Trump appointees stymie recommendations to boost minority voting: report Obama's first presidential memoir, 'A Promised Land,' set for November release MORE’s various climate change regulations, saying it would help create jobs in the fossil fuel industry.

“I am taking an historic step to lift the restrictions on American energy, to reverse government intrusion and to cancel job-killing regulations,” he said.

The president defended his climate change policies on Saturday amid the demonstrations, insisting that "rigorous science is critical to my Administration’s efforts to achieve the twin goals of economic growth and environmental protection."