I mean one obvious thing has already started: governments taxing the sun (well, solar panels) pretty heavily (meaning above VAT), which I imagine will increase, and what the result will be. It's weird to say this, but solar panel smuggling is actually already a thing now. I used to have a Louis XIV painting somewhere ...
Oil appears to be 33% of total energy usage, and if you count all fossil fuels (oil, coal, nat. gas) it's 81%. What happens when that starts dropping.