Why don't people care?

I'm impressed for 15 you have a great grasp of the world and what's going on, most people your age don't. I've struggled with the same question. My realization is don't worry about what others are doing or not doing just focus on what you can do and do your part. People will eventually notice, well some anyway and that will influence them. So just do your part and encourage others when the time is right, but don't sweat it so much you can't make people do things.Just go with the flow of life and do your thing. I commend you by the way for being so socially conscious.