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GS Paper IUPSC Prelims 2021
Ecology & Ecosystems
Question No. 72Interactive Test Mode
00:00
+2-0.66

Q72. What is blue carbon?

What is blue carbon?

Select the correct option below (or cross out options to eliminate)
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Official Answer Key & Detailed Solution

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Official UPSC Answer KeyUPSC Prelims 2021 • Environment and Ecology

Correct Answer: Option (A) — Carbon captured by oceans and coastal ecosystems

Concept & Option Breakdown

Standard Reference Verified

Blue carbon refers specifically to the carbon captured and sequestered by marine and coastal ecosystems, primarily mangroves, tidal salt marshes, and seagrass meadows. These ecosystems store large quantities of organic carbon in their biomass and underlying sediment.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2021 (Q72)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicEnvironment and Ecology → Ecology & Ecosystems
Official Answer KeyOption (A) — (a) Carbon captured by oceans and coastal ecosystems

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Frequently Asked Questions — UPSC Prelims 2021 Q72

What is the official answer for UPSC Prelims 2021 GS Paper I Question 72 (Environment and Ecology)?

The official UPSC answer key for this 2021 Environment and Ecology (Ecology & Ecosystems) question is Option (A): "(a) Carbon captured by oceans and coastal ecosystems". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2021 question belong to?

This question belongs to GS Paper I under the subject "Environment and Ecology" and micro-topic "Ecology & Ecosystems". You can explore all repeated questions from Ecology & Ecosystems in Acme AI's 3D Prelims PYQ Realm or practice 50 full-length and sectional tests in the APT Prelims Test Series.

How can I solve this Ecology & Ecosystems UPSC Prelims question using option elimination?

To solve Ecology & Ecosystems questions in UPSC Prelims, identify extreme modifiers, verify core NCERT conceptual definitions, and eliminate mutually contradictory statement pairs before locking your final option.

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