First Conditional. We use it to talk about a possible future result., If + present simple → will / won't + verb, If they destroy the forest, there won't be any wildlife., If they don't clean up the river, the fish will die., If they build a lot more houses, it will be very noisy., First Conditional. We use it to talk about a possible future result., If they plant more trees, animals will have homes., If they don't throw rubbish in the river, the fish will live., If they don't care for the wildlife, it won't be a beautiful place.

First Conditional

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