- If we go to school on foot, environment will had less pollution
- If we travel by public transports, there won't be traffic jams.
- If we don't cut down the trees, there won't be any drought and flood.
- If we don't throw trash on the street, the environment will be clean.
- If we turn off the light bulbs before going out, we can save electricity.
- If we put trash into garbage bin, the environment may be green.
- If we don't litter trash into the river, the rivers won't polluted.
- If we plant more trees , the air will be fresh.
- If we reduce the amount of electricity we use, we must protect the environment.
- If we use solar enery, we will save natural resources.