General Studies 2023 GS Paper III 10 marks 150 words Compulsory Explain

Q8

What is oil pollution? What are its impacts on the marine ecosystem? In what way is oil pollution particularly harmful for a country like India? (Answer in 150 words) 10

हिंदी में प्रश्न पढ़ें

तेल प्रदूषण क्या है? समुद्री पारिस्थितिकी तंत्र पर इसके प्रभाव क्या हैं? भारत जैसे देश के लिए किस तरह से तेल प्रदूषण विशेष रूप से हानिकारक है? (उत्तर 150 शब्दों में दीजिए)

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Directive word: Explain

This question asks you to explain. The directive word signals the depth of analysis expected, the structure of your answer, and the weight of evidence you must bring.

See our UPSC directive words guide for a full breakdown of how to respond to each command word.

How this answer will be evaluated

Approach

The directive 'explain' requires clear elucidation of oil pollution as a concept, followed by systematic exposition of marine ecosystem impacts and India's specific vulnerability. Structure: brief definition (20 words) → marine impacts with ecological mechanisms (60 words) → India-specific dimensions covering coastline, economy, fisheries (50 words) → concluding with integrated coastal management or international obligations (20 words).

Key points expected

Definition covering accidental spills, operational discharges, and natural seeps as sources of oil pollution
Marine ecosystem impacts: oil slick formation, hypoxia, bioaccumulation, disruption of food chains, and long-term habitat degradation
Physiological impacts on marine fauna: coating of feathers/fur, ingestion toxicity, reproductive failure in marine mammals and seabirds
India-specific vulnerability: 7,500 km coastline, 13 major ports, heavy tanker traffic via sea lanes, dependence on marine fisheries for 4 million livelihoods
Economic and strategic dimensions: threat to mangrove ecosystems (Sundarbans, Gulf of Kutch), impact on coastal tourism and ONGC offshore operations
Regulatory context: mention of MARPOL, National Oil Spill Disaster Contingency Plan, or Coast Guard responsibilities

Evaluation rubric

Dimension	Weight	Max marks	Excellent	Average	Poor
Demand-directive understanding	20%	2	Answer addresses all three components (definition, marine impacts, India-specificity) with proportional weightage; demonstrates grasp that 'explain' requires causal mechanisms, not mere listing	Covers all three parts but treats them as isolated segments without showing interconnections; minor imbalance in word allocation	Misses one or more components (commonly India-specific dimension) or misinterprets directive as 'enumerate' or 'describe' without explanatory depth
Content depth & accuracy	20%	2	Scientifically accurate on oil toxicity mechanisms (PAHs, smothering), distinguishes between light and heavy crude impacts; precise on India's coastal ecology and economic dependencies	Generally accurate but generic on ecological impacts; vague on India's specific vulnerabilities; minor factual errors on marine biology or coastal geography	Significant scientific inaccuracies (confusing oil pollution with plastic/plankton); incorrect or missing data on India's coastline, ports, or fisheries sector
Structure & flow	20%	2	Tripartite structure clearly demarcated yet integrated; smooth transitions between definition → ecosystem → India; effective use of limited word count with no redundancy	Recognizable structure but abrupt transitions; some repetition between marine impacts and India sections; minor deviation from 150-word limit	Disorganized or missing structure; excessive focus on one component; rambling introduction or conclusion; failure to respect word constraint significantly
Examples / case-law / data	20%	2	Specific Indian examples: Mumbai oil spill (2010), Chennai oil spill (2017), Ennore collision; or data on India's 2.02 million tonnes marine fish production, 30% GDP from coastal districts	Generic international examples (Exxon Valdez, Gulf of Mexico) without Indian anchoring; or mentions India but without specific incidents/data	No examples or data; irrelevant examples; fabricated statistics; confusion with other pollutants or countries
Conclusion & analytical edge	20%	2	Forward-looking conclusion linking oil pollution to Blue Economy objectives, climate-ocean nexus, or need for regional cooperation (IORA/Indian Ocean Rim); critical insight on enforcement gaps in MARPOL compliance	Summary restatement without new insight; generic call for 'strict laws and awareness'; no connection to broader GS3 themes (economic growth, environmental sustainability)	Missing conclusion; abrupt ending; or conclusion introducing entirely new unsubstantiated claims; purely descriptive closure without analytical lift

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