I think the only way out is political top-down decisions rather than mental shifts. Habits are just too strong and the competitive disadvantage of frugality just too inconvenient for most of our primate brains. Environmentalism and passive-aggressively oppressing of habits via high moral self-standards is too easily strawmanned or misinterpreted as ideology by the mobs. -- The most ignorant win.

The largest impact will be by China, India and Africa, so we'll quickly need to popularize green energy such as solar and perhaps the kinds of nuclear technology which can't be used for weapons (nuclear waste might be preferable over damages caused by pollution and climate change).

We need to be decisive and strong, which might involve bold and expensive media events and populism.

The ones who are able to think in the long term need to stop fighting themselves for superficial issues, political correctness and minor details. We need to strengthen our arguments instead and keep in mind that we are following the same ultimate goal.