Define the following terms.
1. Manhole cover
2. Landfills
3. Vermicompost
4. Sludge
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1)The sewer is covered by a lid known as a manhole cover. A person can enter the sewer through this manhole to check for any leakage or blockage.
2) Landfills are huge piles of garbage.
3)Vermicomposting is a method in which worms are used to decompose vegetable peels, food waste etc
4) Solid waste in sewers, which is rich in organic matter is known as sludge.
Explanation:
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