Even people who accept and believe climate change is real are unwilling to make any personal sacrifices and magically think some scientists somewhere will just solve the problem.

Nobody is coming to your rescue, the planet will save itself from the plague that is our industrial society. We could pretty easily fix this, but it would be politically unpopular, and therefore, won’t happen.

“Meaningful”, as in, “even if I alone do it this will somehow stop climate change”? Not possible, very obviously.

Meaningful as in “if everyone would adapt that mindset we’d be half way to the solution” - there are many, many options. Vegan diet, fuck cars, use public transport, buy local, vote green (or the closest approximation available), support sustainable companies, less consumerism in general, change your electricity provider, get politically involved, social activism, convince your friends and family…

Pick and chose as many as you want and can and you start becoming part of the solution.