By my back of the envelope math, once we've fully transitioned away from fossil fuels as an energy source (distinct from, say, as a chemical feedstock), and fully remediated the externalities and damage they've done both in terms of atmospheric CO2, political violence, and direct environmental contamination, the entire industry is likely going to be net negative as a whole from the beginning of usage to now. That's kind of an amazing thing to think about, even if it is an order of magnitude off in one direction or another.

A similar example would be the asbestos mining and manufacturing industry, which has been essentially fully destroyed by legal settlements.