360° UPSC Mains Analysis

Concrete fever: On India and heat management

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Flora & Fauna

House Sparrow (Passer domesticus)
Status: Least Concern
Threat: Urban heat islands and loss of green cover reduce nesting sites, water availability, and insect populations, leading to severe thermal stress and population decline in cities.
Urban Canopy Trees (e.g., Neem - Azadirachta indica)
Status: Not Evaluated
Threat: Prolonged heatwaves and dropping water tables cause moisture stress, leaf scorching, and reduced carbon sequestration capacity, leading to premature tree mortality.

Ecology Impact

Extreme heatwaves and the expansion of Urban Heat Islands (UHIs) severely disrupt urban ecosystems, leading to microclimate alterations and thermal stress on urban biodiversity. The loss of green cover and the sealing of urban surfaces accelerate the drying up of local wetlands and water bodies, degrading habitats for urban avian and insect species. This ecological degradation compromises urban ecosystem services, such as natural cooling and air purification.

Science & Tech Angle

The underlying science involves the thermodynamics of Urban Heat Islands (UHIs), where low-albedo materials like concrete and asphalt absorb and re-radiate solar radiation, coupled with anthropogenic waste heat from air conditioning. This is exacerbated by the 'wet-bulb temperature' phenomenon, where high humidity limits the human body's ability to cool itself through sweat evaporation, making heatwaves lethal. Mitigating this requires passive cooling technologies, high-albedo cool roofs, and urban green infrastructure to enhance evapotranspiration.

Climate Change Link

The article highlights the direct link between global climate change and the rising frequency and duration of heatwaves in India's Core Heatwave Zone. The Supreme Court of India in M.K. Ranjitsinh v. Union of India (2024) recognized the fundamental right to be free from the adverse effects of climate change under Article 21 and Article 14 of the Constitution. This legal precedent underscores the state's duty to mitigate heatwaves, aligning with India's updated NDCs under the Paris Agreement to reduce emissions intensity of GDP by 45% by 2030 from 2005 levels.

Sustainable Development

Addressing heat stress aligns with SDG 8 (Decent Work and Economic Growth) and SDG 3 (Good Health and Well-being), highlighting the need to reform the Occupational Safety, Health and Working Conditions Code, 2020, to mandate enforceable heat safety standards. It also advances SDG 11 (Sustainable Cities and Communities) by promoting passive cooling and green cover to counter the Urban Heat Island effect.

International Frameworks

Paris Agreement
Aims to limit global warming to well below 2°C, preferably 1.5°C, which directly addresses the global emissions driving the frequency and intensity of heatwaves.
Kigali Amendment to the Montreal Protocol
Mandates the phase-down of hydrofluorocarbons (HFCs) used in air conditioning, addressing the thermodynamic feedback loop where cooling technologies exacerbate global warming.
Sendai Framework for Disaster Risk Reduction (2015-2030)
Classifies extreme heatwaves as meteorological disasters, emphasizing the need for resilient urban infrastructure, early warning systems, and heat action plans.

Sources consulted

AI-generated study aid. Grounded in web research, but verify critical facts against official sources before your exam.

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