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New Data Shows Mumbai Air Pollution Rose Sharply, But Delhi Is Far Worse

Much has been made of Mumbai's air pollution in recent months being worse than Delhi's notorious pollution. Delhi Chief Minister Arvind Kejriwal even tweeted a global ranking, in which Mumbai was placed second, saying that after a long time the national capital was not in the list of the world's most polluted cities. That was on a day, however, when the Delhi region benefited from strong winds blowing away much of the pollutants in the air. The ranking was by a Swiss firm, IQ Air, and is updated frequently. While Mumbai's air quality has indeed deteriorated, new data from IQ Air shows different and worrying trends about the real picture. This is based on the measurement of PM 2.5 pollutant levels, which is the microscopic and lethal particulate matter (PM) that can beat the human body's defences and embed itself deep in the lungs and thereon into other organs. The new data (table below) shows how Delhi's air pollution level has been higher than Mumbai's every month in 2022, particularly in November-December, which was when Mumbai's air pollution first made headlines for surpassing the national capital's. And it's not just recent months. For the past four years, Delhi's annual average of PM 2.5 has been an average of 95 micrograms per cubic metre, whereas Mumbai's has been 45. The metropolis on the coast usually benefits from the sea breeze clearing the city of pollution, mainly from vehicles, construction and road dust. However, this winter, doctors have reported a spurt in patients with respiratory infections, especially among children

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