That was a great video. And, from the co-founder of Greenpeace! I'd add that during the most recent warm periods he mentioned (Roman and Medieval) civilizations thrived, while they struggled during the cooler periods like the Little Ice Age. That's rarely mentioned.
Very good point and one that is never discussed by the climate change fanatics. The series about the Little Ice Age brought this out. People in Europe struggled mightily during the colder periods and was one of the big factors that led to the dark ages, due to famine and shortage of food, Warmer periods means longer growing seasons, more land at the higher latitudes that can grow crops. Humans can spend more time creating economic useful endeavors rather than devoting time to keeping warm, although this has been lessened now due to technology.
I've been trying to tell the gorebal warming crowd about weather history for a long time, so, its about time folks are talking about the realities of weather.
This country felt the effects of the little ice age, thousands died in the years around 1815-16 which are called the years without summer. Crops failed, folks starved. We are still feeling its effects, we're still coming out of it. The Little Ice Age came about quickly, temps dropped an average of 12ºF within 10-20 years. Prior to that the temps were an average of 8ºF warmer than today and here the 'experts' are trying to tell us that 2ºF would be devastating.
This has been talked about here in the recent past and of course some scoffed. There is a lot of info regarding this.
But, of course, climate change is our biggest threat. We are told that just about daily. Heck, its more of a threat than isis.

But, I digress as usual. This is subject I've looked into for decades.