| A.Two. | B.Three. | C.Four. | D.Five. |
| A.It will help to save much money. |
| B.It will help to reduce a great deal of CO₂. |
| C.It will save a lot of oil that runs your car for a mile. |
| D.It will be like planting 1.7 million acres of new trees. |
| A.Ways 3 & 4. | B.Ways 2 & 3. |
| C.Ways 3 & 5. | D.Ways 2 & 4. |
| A.They all help reduce the use of energy like electricity. |
| B.They all cut down the number of the use of paper. |
| C.They all produce less greenhouse gases as a result. |
| D.They all help protect our trees and forests. |
| A.To make your garden beautiful |
| B.To help make cleaner air |
| C.To save environment |
| D.All of above |