Claim: the concentration of carbon dioxide in Earth's atmosphere has climbed to a level last seen more than 3 million years ago — before humans even appeared on the rocky ball we call home
Fact-check: It's true that the current carbon dioxide level is higher than any time in human existence - Science Feedback
Verdict: accurate
Organisation: Science Feedback
Author: Scott Johnson
Date published: 2019-05-18T09:29:56