1.If I turn off unnecessary lights, I will save energy
2.If you use a two-page paper, you will save money and will not cut of trees.
If more people bike instead of driving a car, they will help reduce the amount of carbon dioxide in the atmosphere
If I use stairs instead of elevators, I will save energy
If you use clothe bag, you will save global warming
If more people use cartons, they will help reduce using foam
If I want to save the world, I will use more bicycles to learn