I find it really bizarre that China and India are the immediate "go to" global baddies for most posters. China, especially, seems to be making serious efforts recently to combat climate change.
At the moment, the countries proving to be most recalcitrant are actually Russia, Brazil and Australia - the US is off the naughty bench since Biden got in, happily.
But no country is doing enough, and that's why we have to constantly be pressuring our governments to let them know that we care about this issue. If you don't want to get out on the streets, write to your MP.
Sure, you can do stuff personally, especially in the areas of increasing biodiversity in your garden or even your local area, giving up meat and dairy, not flying etc- but where we are right now, just spreading the word and raising awareness and building a groundswell of concern amongst citizens is probably more valuable.