[doublepg23]

Oil companies knew about climate change in the _1980s_ https://en.wikipedia.org/wiki/ExxonMobil_climate_change_cont...

[pier25]

Climate change was well known before that.

There's actually a report to Lyndon Johnson in 1965 about the dangers of climate change.

https://www.theguardian.com/environment/climate-consensus-97...

[scruple]

I suspect they knew well before the 1980s. [0][1]

[0]: https://www.youtube.com/watch?v=0lgzz-L7GFg

[1]: https://climate.nasa.gov/blog/447/unchained-goddess/