1)You must follow after people who throw garbage on a ground.
2)You must not throw garbage on a ground.
3)Acid rains, global warming, air and water pollution, and overpopulation are the problems that threaten human lives on the Earth, these things we can not prevent.
4)No smoking in public places.
5)On the picnic clean up after themselves.
6)Do not break windows.
7)To plant as many trees and plants.
8)Distribute malicious chemicals.
9)Сreate trash cans for different things.
10)You can burn waste.
Дальше сам(а)