30 years ago I attended a university lecture in an economics class and the professor spoke about the economic consequences of global warming - some places will be better off and plenty of places will be worse off. There will be water shortages in some places, while heavy rainfall in others. He presented it as a given fact that the global warming is coming - and pretty much the whole audience was shocked. Finally someone asked if he really thinks that it is unavoidable. And his answer was yes, that is human nature. As long as fossil fuels are there and cheap to explore someone will use them.

30 years later it looks like he was right.

Edit: the IPCC was founded in 1988 thus people started in the 70ies to understand that there will be a problem but there was a very long period of inactivity. Personally I am quite optimistic that fusion will become commercially available before 2040.

And dear downvoters, dont shoot the messenger.