Leonardo DiCaprio's new documentary, "Before the Flood," has been on YouTube for just a few days, but it already has millions of views.

The documentary is a moving, uncompromising look at climate change, produced by both DiCaprio and National Geographic. In the documentary, DiCaprio, who's been an outspoken supporter of climate action, gives us a refreshing, very frank look at what the climate change situation is really like.

DiCaprio doesn't pull his punches on the big stuff, but what actually fascinated me were some of the smaller, simpler, more emotional moments.

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