I live in "the west" and I can contribute to change there. So I do. Try to change what you can change, instead of thinking about what you can't change and not doing anything.
The USA is still the biggest polluter, even with 1/5 the population of China.
Also, making the technology viable and proving it so is the only solution.
https://www.statista.com/statistics/271748/the-largest-emitt...
Sure, if you're talking per capita, US people emit more carbon dioxide but with your "even with 1/5th" and "the biggest polluter" it suggests you're thinking total not per capita.
They produce and install more solar panels then every other country combined.