NASA is pretty good scientists. You know, they're actually driving rovers around on Mars. They're pretty good at what they do. And here's what NASA maintains there is unequivocal evidence that Earth is warming at an unprecedented rate and that human activity is the principal cause. And if you don't trust NASA, if you don't want to take their word for it, you can just take a look at the data. It's pretty straightforward. (02:15–02:30)
CLAIM
Asserts that NASA has evidence showing Earth is warming rapidly due to human activity.
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