No one takes anyone really serious about the envioronment and that is sad. You just have to do your part and people will live in whatever level of ignorance they have placed on yourself.
From a psychological viewpoint it is not healthy for you to dwell on others as being young it is time for you to build your value system and be firm in that and dont try to change thinking of people who dont want to change.
When you get a great education maybe one day you will be an environmental lobbyiest and be able to effect change on a national level, I would put my dreams on that, not trying to take someone and change their minds that have no reason to listen.
Good luck,
Protect your heart and yourself
Your assistant