1. If farmers didn’t use too many pesticides and herbicides/ if farmers used fewer pesticides and herbicides, the soil wouldn’t be poisoned.
2. If you don’t tell me what’s wrong, I can’t help you.
3. If the food isn’t/ weren’t containinated, many people won’t/ wouldn’t have stomachache.
4. If you don’t stop swimming in that lake, you will have skin rashes.
5. If John didn’t live in the area affected by air pollution, he wouldn’t have breathing problem.
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