Ooops. It wasn't just Big Oil that knew about their role in climate change and fought a misinformation campaign against doing anything about it. The trade association for US electric ulilities did too. They got a heads up in 1968, just shy of 50 years ago, and then did research on it. So all their members knew.
What is particularly sad about this is that the average life for a thermal power plant (i.e., one burning coal or natural gas) is 40 years. Had they taken this seriously and pushed for innovation instead of obfuscation, we could have had a renewable power grid by now.
Utilities Knew About Climate Change Back In 1968 And Still Battled The Science - HuffPost