I'd take it with a healthy dose of skepticism.

I did write "he said" intentionally there because he's also the guy who said he read 200 books on climate change in two years when he was advising some CEO who was on a UN committee on climate change and the only way Peterson has read books on climate change is if their titles are something like "Climate Change: What The Government Doesn't Want You To Know" and "The Great Climate Hoax". But if you're trying to become educated about climate change then you shouldn't be reading books anyway, you need to be reading scientific articles instead. Of course there's no way that you could ever disprove his claim and he'd never appear in front of a camera opposite a person who is an actual climate scientist because he knows that he'd get called out for his towering ignorance on the subject.

Suffice it to say that the guy's full of shit and you have my full support if you choose not to believe what he says.