Q.Assess the impact of global warming on coral life system with examples. (Answer in 150 words)
How to approach: Structure the body into Tangible Achievements/Significance vs. Persistent Gaps/Challenges, followed by a forward-looking conclusion.
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Anthropogenic greenhouse gas emissions have driven global warming, leading to a steady rise in ocean temperatures. This warming severely threatens marine ecosystems, particularly coral reefs.
Body Analysis
Impact of Global Warming on Corals
Coral Bleaching: When water temperatures rise, corals expel their symbiotic zooxanthellae algae, which provide them with food and vibrant colors. This bleaching leaves corals vulnerable and often leads to widespread mortality, as observed in Australia's Great Barrier Reef.
Ocean Mineral Fluctuations: Temperature changes alter the concentration of essential minerals like calcium and magnesium in seawater. This imbalance hinders corals' ability to calcify and build their skeletal structures, leading to the collapse of colonies, such as those in the Caribbean.
Nutrient Depletion: Warming waters reduce the abundance of phytoplankton, the foundational nutrient source for coral ecosystems, particularly in subtropical regions.
Mineral Loss: Sustained thermal stress causes corals to lose vital mineral components necessary for survival.
Way Forward
Emission Reduction: Taking urgent global steps to curb carbon emissions and phase out fossil fuels (CO2, NOx, SOx).
Pollution Control: Banning non-biodegradable plastics and reducing runoff into marine environments.
Restoration: Deploying artificial reefs to stabilize degrading coastal ecosystems and prevent island erosion.
Conclusion
UNESCO warns that if global warming continues unabated, coral reefs across all 29 World Heritage reef sites could disappear by the end of this century. Fulfilling commitments under the Paris Agreement and SDG 13 (Climate Action) is imperative to save these vital marine habitats.
Question Specifications, Marking Rubric & Syllabus Mapping
| Examination & Year | UPSC Civil Services Mains Examination 2019 (Question 1) |
|---|---|
| Paper & Syllabus Topic | General Studies Paper I — Heritage, History, Society & Geography → Physical, Human & Indian Geography |
| Marks, Word Limit & Ideal Time | 10 Marks • 150 Words • Ideal Writing Time: 7–8 Minutes |
| Directive Word & Core Demand | Evaluate / Assess: Weigh the effectiveness, significance, and net impact of a phenomenon or policy measure. |
| Recommended Structure Split | Intro: ~20–25 Words • Body: ~100 Words (3–4 dimensions) • Conclusion: ~20–25 Words |
| AI Practice & Evaluation Tools | Upload Handwritten Answer for 3-Min Vision AI Evaluation | Generate Custom Answer & Mind Map |
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Frequently Asked Questions — UPSC Mains 2019 GS1 (Geography)
How should I structure the answer for this UPSC Mains 2019 GS Paper I question on Geography?
This 2019 GS Paper I question carries 10 marks with a 150-word limit and uses the "Evaluate / Assess" directive. Structure the body into Tangible Achievements/Significance vs. Persistent Gaps/Challenges, followed by a forward-looking conclusion. Follow the ideal word split (Intro: ~20–25 Words • Body: ~100 Words (3–4 dimensions) • Conclusion: ~20–25 Words) and aim to finish within 7–8 Minutes.
Which UPSC Mains syllabus topic does this 2019 question belong to?
This question is part of General Studies Paper I — Heritage, History, Society & Geography under the syllabus module "Physical, Human & Indian Geography". You can explore all repeated questions from Geography in Acme AI's 3D PYQ Realm or filter all Geography PYQs on the Mains PYQ Directory.
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