He tries a little too hard to make gradual global changes more tangible (what does 930 Hiroshimas even mean?), but in general he does a good job of stating the obvious for us lunkheads. The developed world is nearly at civil war in large part about the tiny number of refugees we have today---we will be completely unable to deal with climate refugees in the tens or hundreds of millions, and it won't be wet bulb temps that finish our society off, it will be us doing it to each other.