If we had more spce, we would plant more trees.
If noise pollution doesn't happen regularly, it won't cause stress or nuisance.
If the karaoke bar didn't make so much noise almost every night, the residents wouldn't complain to its owner.
If he didn't work in a noisy office, he wouldn't have a headache after work every day.
Trees' leaves are damaged because of the acid rain.
Radioactive pollution is very dangerous because it can cause abnormal growth.
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