4. The water temperature increases. Some aquatic creatures are unable to reproduce. (Rewrite, using “Conditional sentence type 1”) - If the water temperature increases, some aquatic creatures will unable to reproduce. 5. Farmers use much chemical fertilizer, so the soil is polluted.( Rewrite, using “Conditional sentence type 2”) - If farmers used much chemical fertilizer, the soil would polluted. 6. Their children have birth defects. The parents were exposed to radiation. ( Combine the sentences, using “since”) - Since the parents were exposed to radiation, their children have birth defects.

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