"Global Cooling" was briefly proposed in the 70's to explain why temperatures seemed to have gone down from WWII to them. It was later attributed to aerosols fr

"Global Cooling" was briefly proposed in the 70's to explain why temperatures seemed to have gone down from WWII to them. It was later attributed to aerosols from pollution blocking some sunlight. It was never a consensus on the climatologist community but got attention due to news articles that missed the details and ambiguity of the proposal. It often gets brought up by climate change deniers and that may be why you think you've heard about it more than once. https://en.m.wikipedia.org/wiki/Global_cooling https://en.m.wikipedia.org/wiki/Global_cooling