GS Paper 1 10 marks · 150w 9 min Medium
Discuss the consequences of climate change on the food security in tropical countries.
Subtopic: Geography · climate change and food security
How to structure your answer
Introduction (four pillars of food security; tropical crops near thermal limits per IPCC AR6) → Yield and productivity losses → Water stress and extreme weather events → Fisheries, pest spread and nutritional decline → Access, prices and stability effects → Conclusion (climate-resilient agriculture)
Detailed model answer
196 words · target 150 words · 9 min
Food security rests on four pillars — availability, access, utilisation and stability (FAO). The IPCC AR6 warns that tropical countries, whose crops already grow close to their thermal limits, face the sharpest climate-driven food risks.
Consequences of climate change
- Falling yields: warming cuts productivity of staples such as rice, wheat and maize fastest in low latitudes; higher night temperatures are linked to lower paddy yields across monsoon Asia and Sub-Saharan Africa.
- Water stress: erratic monsoons, droughts and glacial melt disrupt irrigation-dependent farming, as in the Horn of Africa drought (2020–23).
- Extreme events: cyclones, floods and heatwaves destroy standing crops — India's March 2022 heatwave shrivelled the wheat crop and forced an export ban.
- Pests and disease: warming widened the range of desert locusts (2019–20 swarms across East Africa and India) and crop pathogens.
- Fisheries decline: coral bleaching and poleward migration of fish stocks erode the protein supply of tropical coastal communities.
- Nutritional quality: elevated CO2 lowers zinc, iron and protein content of grains, deepening hidden hunger.
- Access and stability: harvest failures spike food prices, while climate-linked migration and conflict disrupt supply chains for the poor.
Climate-resilient agriculture — drought-tolerant seeds, agroforestry, crop insurance and early-warning systems — is therefore central to tropical food security.
What an examiner expects to see
- Anchor the answer in FAO's four pillars — availability, access, utilisation, stability — and show climate change strikes all four.
- IPCC AR6: tropical crops already operate near thermal limits, so warming cuts yields of rice, wheat and maize fastest in low latitudes.
- Extreme events cause direct crop loss — India's 2022 heatwave and subsequent wheat export ban is a ready, verifiable example.
- Indirect channels matter: locust and pest range expansion, coral bleaching and fisheries decline, CO2-driven fall in grain zinc, iron and protein.
- Cover the stability dimension: price spikes, climate migration and conflict disrupting access for the poorest.
- Close forward-looking: climate-resilient seeds, agroforestry, insurance and early-warning systems.
Concrete cases, schemes and judgments
- India's March 2022 heatwave cut wheat output and triggered a wheat export ban
- Desert locust upsurge (2019–20) across East Africa and western India, linked to unusual cyclone-driven rains
- Horn of Africa drought (2020–23) pushed millions into acute food insecurity
- Studies show elevated CO2 reduces zinc, iron and protein content in rice and wheat
- IPCC AR6 finding that climate change has already slowed global agricultural productivity growth
Terminology to weave into the answer
four pillars of food securitythermal limits of cropshidden hungerclimate-resilient agricultureIPCC AR6price volatility