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What is sewage?
Why sould sewage be treated before being relased into the environmint?
The water and human wastes that are washed down sinkes,toilets,and shower.
disease causing organisms must be treated or people will be come ill.
How can fertillzer pollute water?
fertillzer can wash into a pond causeing algae to grow wich stops sunlite from reaching the plants and the plants will die.
What are pesticdes?
pesticdes is a chemicals that kill crop destroying organasns.
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