Nice piece. I loved the (too brief) earthrise sequence.
I actually don't like Sigourney Weaver very much, and the whole idea of having Hollywood types on screen in these things bugs me. And they could have snuck in 60 seconds of actual chemistry.
And, well, there was the claim that the only way to stop this is to stop emitting CO2. Not exactly. The only way to stop this is to stop emitting net CO2. Sequestration is expensive and problematic, but perhaps less so than stopping gross emissions altogether. Of course that's sort of off topic, but it was a bit jarring to have that little piece of opinion slipped in among the facts, and it's an important issue.
But the piece is very much worth watching and considering anyway. h/t Jim Prall and Wit's End