people dump wastes and poisonous chemicals into water
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tiny animals eat pollutants in polluted water
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fish and shellfish eating tiny animals contain poison in their bodies
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people who eat these fish et some diseases
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they have to go to hospital
↓
their family members take care of them
6. If
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7.
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6.=> If people dumped wastes and poisonous chemicals into water, tiny animals would eat pollutants in polluted water
7. If tiny animals ate pollutants in polluted water, fish and shellfish eating tiny animals would contain poison in their bodies
8. If fish and shellfish eating tiny animals contained poison in their bodies,people would eat these fish et some diseases
9. If people ate these fish et some diseases, they would have to go to hospital
10. If they had to go to hospital, their family members would take care of them
