Many haven't ever heard of "Global Cooling" but back in the 1970s it was the existential threat to our existence...

https://www.youtube.com/watch?v=7tAYXQPWdC0&pp=ygUcZ2xvYmFsIGNvb2xpbmcgbGVvbmFyZCBuaW1veQ%3D%3D