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प्रश्न
Nuisance growth of aquatic plants and bloom-forming algae in natural waters is generally due to high concentrations of ______.
विकल्प
carbon
sulphur
calcium
phosphorus
उत्तर
Nuisance growth of aquatic plants and bloom-forming algae in natural waters is generally due to high concentrations of phosphorus.
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The loudness of a sound that a person can withstand without discomfort is about ______.
Match the following and choose the correct option:
| Column I | Column II |
| A. Environment Protection Act | i. 1974 |
| B. Air Prevention & Control of Pollution Act | ii. 1987 |
| C. Water Act | iii. 1986 |
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The correct matches are:
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Match the following and choose the correct option
| Column I | Column II | ||
| A. | Environment Protection Act | i. | 1974 |
| B. | Air Prevention & Control of Pollution Act | ii. | 1987 |
| C. | Water Act | iii. | 1986 |
| D. | Amendment of Air Act to include noise as an air pollutant | iv. | 1981 |
