1. recycle.
2. turn off lights you're not using.
3. plant trees around your area.
4. plant plants around your area.
5. car pool with your friends.
6. don't drive somewhere that you can walk, bike, scooter, skateboard [etc.].
7. excersize more, electricity less.
8. cut down dead trees for less air pollution.
9. take out dead plants for less air pollution.
10. don't litter, pick it up instead.

you can make this fun by doing as a group with your friends.