1. What/ happen/ if/ water pollution/ stop?
2. We/ be/ happy/ if/ air pollution/ the world/ be/ a/ better place?
3. If/ there/ be/ no more pollution/ the world/ be/ a better place?
4. If/I/ be/ you/I/ take/ these bottles/ the bottle bank.
5. If/ people/ not really care/ the environment/ they/ not try/ save it.
6. The river/ not be/ so polluted/ if/ factories/ not dump/ waste/ it
7. We/ be/ less worried/ if/ oil spills/ not have/ such destructive effects.
8. If/ we/ destroy/ the ozone layer/ what/ save/ us/ the UV rays?