11. Pollution and Pollution Control

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1.
Which of the following is not a feature of the Eutrophic lakes?
2.
Which of the following work as bio indicator of environmental pollution?
3.
Which among the following is measured by Dobson unit ?
4.
Contamination of drinking water with which of the following causes Blackfoot disease (BFD)?
5.
The Great Smog of 1952 took place in which of the following cities?
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