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New Delhi still the most polluted capital of the world

UNITED STATES (OBSERVATORY NEWS) — The Indian capital New Delhi occupies the top ranking of the most polluted capitals in the world for the second year running, according to the IQ AirVisual platform, which compiles air quality data disseminated to worldwide.

In total, 21 of the 30 most polluted cities in the world are located in India, according to a study disseminated by this community platform based in Switzerland and on pollution by fine particles in large urban areas.

In 2019, in New Delhi, the average concentration of fine particles with a diameter less than or equal to 2.5 micrometers (PM2.5) reached 98.6 micrograms per cubic meter of air (µg / m³).

This figure represents more than double the pollution recorded in Beijing. With an average annual PM2.5 concentration of 42.1 µg / m³, the Chinese capital is the ninth largest polluted city in the world.

By way of comparison, in France, the annual average exposure limit value defined in the regulations is 25 µg / m³.

If the Indian capital, which has 20 million inhabitants, remained for the second consecutive year the most polluted city in the world, the authors of the study nevertheless highlighted “significant improvements” last year compared to 2018, in particular under the effect of a more favorable weather, the efforts of the authorities in the fight against pollution and a general economic slowdown.

“Despite these improvements, India still faces great air pollution challenges,” the study said.

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