The price of Petrol is a factor that limits the amount used. Unfortunately it only affects the middle and lower earners. Drastic rationing per capita would also work but create a black ecomomy (and probably a change of government).
Self control will only work for people who care.
What is needed In my humble opinion is a quantum leap in technology to create cheap and non polluting energy.
....and having just read my post it shows that I can talk a lot and not say much. It's mostly self evident and probably didn't need saying. I'll post it anyway.