UPSC CSE 2027Prelims in 201 daysMains in 290 days

How are climate change and the sea level rise affecting the very existence of many island nations? Discuss with examples. (2025, 10 Marks)

Paper GS Paper 2
Word Limit 150 words
Syllabus Topic International Relations – Global Issues and International Fora (Climate Change)

Model Answer

Small Island Developing States (SIDS) emit very little but face the greatest climate risk. As per IPCC AR6, global sea level rose about 0.20 m between 1901 and 2018.

Sea Level Rise warming oceans, melting ice Land Loss atolls submerge Salt Water wells, farms spoiled Livelihood fish, tourism hit Statehood at Risk sovereignty, EEZ, migration

Sea level rise threatens land, water, livelihood and statehood

Threats to Existence

  • Loss of land: Atolls like Tuvalu, Kiribati and the Maldives lie barely a metre or two above sea level.
  • Freshwater crisis: Saltwater intrusion spoils groundwater and farmland.
  • Coral bleaching hurts fisheries and tourism.
  • Stronger cyclones, e.g., Cyclone Pam (2015) in Vanuatu.
  • Statehood: Sinking land raises questions on sovereignty and EEZ (Exclusive Economic Zone) rights.

Responses

  • Kiribati bought land in Fiji (2014) for food security.
  • Falepili Union Treaty (2023): Australia offers Tuvalu citizens a migration pathway.
  • Vanuatu led the push for the ICJ advisory opinion (2025) on climate duties of states.
  • India backs IRIS (Infrastructure for Resilient Island States) under CDRI.

Conclusion

Island nations are the front line of climate justice. Deep emission cuts, adaptation finance and global solidarity can keep them afloat.

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