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Back when I was 6, in 1983, my uncle who worked in the oil industry told me about global warming.
I could totally have been a real radical environmentalist, but I was 6.
A second time around that talk would have an impact, and with some foresight for the next 40 years. I think no one would be surprised if I devoted everything to fixing global warming - they might be surprised at my success in the stock market.
Global warming was first modeled in 1896. And the idea of greenhouse gas was known in around 1856. Knowledge was never the problem.
Sure. When did you first hear about it, and that it was caused by burning fossil fuels?
I was born in the eighties, and I'm sure I've known about it all my life.
Certainly that general knowledge is older than I am.