IMPACT OF CLIMATE CHANGE ON HEALTH

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Context:  Even as countries are meeting at the ongoing Climate Change Conference (COP27) in Egypt, a recent report by Lancet, has traced in detail the intimate link between changing weather events and their impact on the health of people. The 2022 Lancet Countdown on Health and Climate Change: Health at the Mercy of Fossil Fuels points out that the world’s reliance on fossil fuels increases the risk of disease, food insecurity and other illnesses related to heat.

Details:

• The 2022 Lancet Countdown report comes at a time when the world is face-to-face with the threat of climate change.
• According to the World Health Organization (WHO), climate change affects the social and environmental determinants of health — clean air, safe drinking water, sufficient food and secure shelter.
• The Lancetreport indicates that rapidly increasing temperatures exposed people, especially vulnerable populations (adults above 65 years old and children younger than one) to 3.7 billion more heatwave days in 2021 than annually in 1986–2005.

Infectious diseases:

• The changing climate is affecting the spread of infectious disease, raising the risk of emerging diseases and co-epidemics. For instance, it records that coastal waters are becoming more suited for the transmission of Vibrio pathogens. It also says that the number of months suitable for malaria transmission has increased in the highland areas of the Americas and Africa.
• The WHO has predicted that between 2030 and 2050, climate change is expected to cause approximately 2,50,000 additional deaths per year, from malnutrition, malaria, diarrhoea and heat stress.

Food security:

• Every dimension of food security is being affected by climate change.
• Higher temperatures threaten crop yields directly, with the growth season shortening for many cereal crops.
• Extreme weather events disrupt supply chains, thereby undermining food availability, access, stability, and utilisation.
• The prevalence of undernourishment increased during the COVID-19 pandemic, and up to 161 million more people faced hunger in 2020 than in 2019. This situation is now worsened by Russia’s invasion of Ukraine, the report underscores.
• The report argues that even if implemented as a temporary transition, the renewed clamour for coal could reverse whatever gains have been made in air quality improvement and push the world towards a future of accelerated climate change that would threaten human survival.
• Instead, a transition to clean energy forms would undeniably be the sustainable way ahead.

Way Forward:

• A health-centred response to the coexisting climate, energy, and cost-of-living crises provides an opportunity to deliver a healthy, low-carbon future, it states.
• Improvements in air quality will help prevent deaths resulting from exposure to fossil fuel-derived ambient PM2.5, and the stress on low-carbon travel and increase in urban spaces would result in promoting physical activity which would have an impact on physical and mental health.
• The report also calls for an accelerated transition to balanced and more plant-based diets, as that would help reduce emissions from red meat and milk production, and prevent diet-related deaths, besides substantially reducing the risk of zoonotic diseases.
• The report calls for global coordination, funding, transparency, and cooperation between governments, communities, civil society, businesses, and public health leaders, to reduce or prevent the vulnerabilities that the world is otherwise exposed to.

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