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Factories and industries sometimes have waste in a liquid form, and they let it run away through drains. Where do you think these drains go to? What effect could that have on water in rivers? What effect could that have on living things? |
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Factories and industries sometimes have waste in a liquid form, and they let it run away through drains. Where do you think these drains go to? What effect could that have on water in rivers? What effect could that have on living things? |