1, What would happen if the water pollution stopped?
2, Would we be happy if the air pollution made the world to be a better place?
3, If there were no more pollution, would the world be a better place?
4, If I were you, I would take these bottles to the bottle bank.
5, If people didn’t care about the environment, they wouldn’t try to save it.
6, The river wouldn’t be polluted if factories didn’t dump waste to it.
7, We would be less worried if oil spills didn’t have such destructive effects.
8, If we destroyed the ozone layer what would save us from the UV rays?