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UPSC 2011: There is a concern over the increase in harmful algal blooms in the seawaters of India. What could be the causative factors for this phenomenon? 1. Discharge of nutrients from the estuaries. 2. Run-off from the land during the monsoon. 3. Upwelling in the seas. Select the correct answer from the codes given below:
(a)1 only
(b)1 and 2 only
(c)2 and 3 only
(d)1, 2 and 3
Attempt This Question
Not attemptedCorrect Answer: (d) 1, 2 and 3
Harmful algal blooms flourish when nutrient levels in surface waters rise. (1) Nutrient-rich effluents from estuaries, (2) monsoonal run-off carrying fertilisers and sewage, and (3) coastal upwelling that brings deep, nutrient-laden water to the surface all supply the nutrients that trigger blooms, so all three factors are valid. ([licchavilyceum.com](https://licchavilyceum.com/upsc-prelims-2011-solved-paper/?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2011 Environment & Ecology question?▼
The correct answer is option (d): 1, 2 and 3. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Water & Wetland Conservation question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2011, GS Paper 1, as Question 47. It falls under Environment & Ecology > Water & Wetland Conservation.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Water & Wetland Conservation?▼
UPSC has asked 20 questions from Water & Wetland Conservation (under Environment & Ecology) across multiple years. Visit the topic page to see the full list and year-wise trends.