UPSC Relevance
- GS 1 (Geography): Impact of climate change on human geography, migration, urbanization, and vulnerable populations
- GS 2 (Governance): Public health policies, disaster management, global cooperation on health and climate change
- GS 3 (Environment & Ecology): Linkages between climate change, extreme weather, air pollution, and health security
- Current Affairs: Lancet Countdown 2023–24 findings, India’s heatwave mortality, global climate-health policies
- Essay & Ethics: Climate justice, intergenerational equity, and the ethics of health vulnerability under climate change
The Lancet Countdown on Health and Climate Change highlights the rising global health threats caused by climate change. Heatwaves, air pollution, extreme weather, and disrupted food and water systems are worsening mortality, especially among vulnerable populations such as the elderly, children, and outdoor workers. Without urgent climate action, healthcare costs, mortality, and productivity losses are projected to escalate dramatically by 2050.
Major Findings and Impacts
Heat-Related Mortality
- Global heat-related deaths increased by 15.1% over the past decade.
- South Asia, Europe, and North America are most affected.
- India recorded over 3,000 heat deaths in 2024; Delhi hit 52.4°C.
- Heatwaves reduced global labor productivity by 10%, hitting agriculture and construction hardest.
Air Pollution and Health
- 8.1 million deaths in 2024 linked to air pollution (PM2.5 responsible for 4 million).
- India, Pakistan, Bangladesh, and China worst affected.
- In India, Delhi’s PM2.5 touched 450 µg/m³ (90x WHO safe limit).
- Air pollution worsens cardiovascular, respiratory, neurological, and reproductive health outcomes.
Extreme Weather Events
- Wildfires: Canada saw its worst wildfire season, with smoke affecting the U.S. East Coast.
- Floods: Pakistan (2024) and India’s monsoon floods triggered cholera and dengue outbreaks.
- Hurricanes: Category 5 Hurricane Beryl killed 80 in Texas and displaced 500,000.
- Droughts: Horn of Africa famine affected 20 million people; China’s Yangtze River partly dried.
Disproportionate Impacts
- Children: 20% rise in asthma due to pollution; prenatal exposure linked to developmental issues.
- Elderly: Higher vulnerability to heat stroke, respiratory, and cardiovascular diseases.
- Low-Income Communities: Limited access to healthcare magnifies disaster risks.
Economic Burden
- Climate-related healthcare costs could reach $250 billion annually by 2050.
- Heat stress may cause global productivity losses of $2.4 trillion annually by 2030.
- In 2024, climate-linked disasters cost the U.S. economy $400 billion.
Roadblocks and Challenges
- Fossil Fuel Dependence: Coal and oil consumption still rising in India and China.
- Policy Gaps: Weak enforcement of air pollution standards.
- Healthcare Limitations: Inadequate adaptation of hospitals to climate disasters.
- Equity Issues: Developing countries face disproportionate health impacts with weaker resilience.
- Public Awareness: Low recognition of climate-health linkages in policymaking and society.
Way Forward
- Clean Energy Transition: Scale up renewable energy and reduce coal dependence.
- Urban Planning: Invest in green infrastructure, reflective rooftops, and cooling solutions.
- Air Quality Regulations: Stricter vehicle and industrial emission controls.
- Healthcare Adaptation: Climate-resilient hospitals, disaster preparedness, and disease surveillance.
- Global Cooperation: Align health policies with Paris Agreement targets and WHO frameworks.
Conclusion
The Lancet Report underlines that climate change is a health emergency, not just an environmental one. Rising heat deaths, air pollution crises, and climate disasters are overwhelming healthcare systems and economies. For India and the world, integrated climate-health policies, resilient infrastructure, and urgent mitigation are vital. In UPSC terms, it showcases the deep interlinkages between environment, governance, economy, and human well-being—a recurring theme in GS and Essay papers.