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प्रश्न
The question has four options. Choose the correct answer:
Sewage is broken down in
पर्याय
primary treatment
secondary treatment
tertiary treatmen
all the above
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उत्तर
secondary treatment
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संबंधित प्रश्न
Give any two ways in which non-biodegradable substances would affect the environment.
Give reason for the following :
Broken glass utensils are a kind of non-degradable waste.
Give two-ecofriendly ways of treating kitchen wastes.
Why should we not bum dried plant leaves and husk? What is the best way to get rid of them?
What do you do with the leftover food at home?
Disposable plastic plates should not be used because
Read the items mentioned in Columns I and II and fill in the related process in the Column III
| Column I | Column II | Column III | |
| (a) | Organic waste | Earthworms | (i) ______ |
| (b) | Garbage | Dig pit and fill with garbage |
(ii) ______ |
| (c) | Old newspaper | Paper bags | (iii) ______ |
What happens when tea leaves, cotton swabs and old soft toys are thrown into the drain?
Answer the following question in one or two words or sentences:
Who, out of the following should properly dispose of the garbage – father, mother, elder brother, younger sister?
