FactCheck.org's Weekly Update

In making his case for taking swift action on climate change, Democratic presidential candidate Pete Buttigieg inaccurately said that “we could lose half the world’s oxygen because of what’s going on in the oceans.” Scientists say that’s a misreading of the evidence.

Making a point about Defense Department waste, Democratic presidential candidate Andrew Yang related a secondhand story about a Navy fighter pilot who said that airmen routinely dumped fuel into the Pacific Ocean at the end of the fiscal year as a way to preserve the following year’s fuel budget. But the story doesn’t add up.

Twice in the last five weeks, Joe Biden has claimed that despite voting to authorize military force against Iraq in 2002, he opposed the Iraq war from “the moment” it began. That’s not accurate, and Biden now says he misspoke.

A conservative rant circulating on Facebook has been falsely credited to the actor Tim Allen.

A meme circulating on Facebook wrongly attributes a statement about guns to former President Ronald Reagan. The quote is actually from Karl Marx and Friedrich Engels, co-authors of The Communist Manifesto.

A social media meme inaccurately claims that Walmart will no longer sell rifles. Walmart stopped selling “military-style rifles such as the AR-15,” in 2015, and has announced it will no longer sell ammunition for “military-style weapons.” It still sells “long guns for hunting and sport shooting.”

A narrowed field of 10 Democratic candidates debated health care, immigration and gun control, but not all of their claims squared with the facts.