Air Pollution Linked to 16 Million Deaths in India Over the Last Decade

In a stark reminder of the human cost associated with environmental neglect, a new study reveals the grave impact of air Pollution in India, leading to 16 million deaths over the past ten years. This research, conducted by experts from Karolinska Institutet and published in The Lancet: Planetary Health, sheds light on the deadly consequences of prolonged exposure to particulate matter, particularly PM2.5.

Source: BBC News/Youtube

PM2.5 are fine particles less than 2.5 micrometres in diameter—about 30 times smaller than a human hair. Though invisible to the naked eye, these particles can cluster in high concentrations, creating smog that not only obscures visibility but poses severe health risks. When inhaled, these particles penetrate deep into the lungs and enter the bloodstream, triggering inflammatory responses and exacerbating chronic conditions like heart disease, lung disorders, cancer, and even impacting maternal and child health.

The study utilized machine learning to analyze data from air Pollution monitoring, satellite observations, and land use patterns, correlating them with mortality data across 655 Indian districts from 2009 to 2019. The findings are alarming: regions with the lowest Pollution levels reported nearly 20 µg/m3 of PM2.5, while the most polluted districts reached a staggering 72 µg/m3 annually. Each ten unit increase in PM2.5 concentration was associated with an 8.6% rise in mortality risk.

This analysis starkly contrasts with the World Health Organization’s guidelines, which recommend that annual average PM2.5 levels should not exceed 5 µg/m3. The current levels across India far exceed this safe threshold, indicating a pervasive public health crisis that does not spare even those residing in less polluted areas.

Comparatively, stricter air quality standards in Europe and North America have led to significant public health improvements. This disparity underscores the urgent need for India to adopt more stringent air quality regulations to mitigate the effects of Pollution on its population. Not only would this benefit public health, but it would also contribute significantly to global efforts in combating climate change by reducing reliance on fossil fuels, a primary source of PM2.5.

Article information adapted from The Conversation: Air pollution has contributed to 16 million deaths in India in the past decade – new study. Written by Petter Ljungman and Suganthi Jaganathan. This article is provided under a Creative Commons license.

Explore the research here: Estimating the effect of annual PM2·5 exposure on mortality in India: a difference-in-differences approach on the Lancet Planetary Health Journal.

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