I have tried my best to educate people around me to care more about environment to no avail, because to them "it's another guy's problem if we litter on the str

I have tried my best to educate people around me to care more about environment to no avail, because to them "it's another guy's problem if we litter on the street, so keep doing it". What the government is doing ain't helping either, people want to make more money, to buy a car, bigger house etc... why should they care about some random monkeys in a forest that they will never see in their life? It's really depressing, maybe I should find an NGO and join them to protect the wild life.