OK, I just checked him out. On his wikipedia page we have this:
"In 2018, he was quoted as saying "Specifically, I predict that there will be no humans on Earth by 2026", which he based on "projections" of climate-change and species loss."
Look, I'm sorry. But this is the reason I don't think much of credentials. I fully intend to still be alive in 2026, health permtting. Be serious, so do you.
Doomer predictions like that are HORSE. SHIT. And that's putting it politely. Most doomsayers have enough brains to put their predictions of complete and ultimate doom far enough into the future that they won't have to pay any consequences for being wrong. This guy is so dumb he predicts total destruction within the range where we can still remember it and laugh at him.
Sheesh.