Advocating self-denial (and going on protests) by billions of people is a non-starter and won't solve the problem. It smacks of a pseudo-religious attitude that we have to suffer to solve climate change.

Fixes that really work will have to be at the source - the energy generation stage, making existing lifestyles zero carbon. Bear in mind that billions more people have yet to achieve the comfortable high-energy-use lifestyles that we enjoy.