On climate change, the Democrats' message is clear: We believe in science. During the Democratic primary debate on Sunday, the presidential candidates seemed to take pleasure in distancing themselves from their science-doubting Republican counterparts.

The Democratic candidates used a question from the popular YouTube channel MinuteEarth to attack the Republicans' skepticism. Watch the video (above) of the question and the candidates' responses.

Sen. Bernie Sanders (I-Vt.) began by laying out the facts. "The debate is over," he said. "Climate change is real."

In typical Bernie fashion, he then pivoted to criticize the influence of money in politics. Next he lunged for the easy target: Donald Trump.

"It is beyond my comprehension how we could elect a president of the U.S., somebody like Trump, who believes that climate change is a hoax invented by the Chinese," Sanders said.

Former Maryland Gov. Martin O'Malley picked up on that last point, praising the "Democratic stage, where we actually believe in science." He pushed his plan to move the country to 100 percent clean energy by 2050, which is perhaps the most ambitious climate change proposal from any of the presidential candidates.

Former Secretary of State Hillary Clinton, who battled with Sanders for airtime all night, didn't get a chance to respond. But her platform shows that she, too, is down with science.

Also on HuffPost:

PHOTO GALLERY Here's What The 10 Leading GOP Candidates Think Of Climate Change