India has imposed stricter anti-pollution measures in its capital New Delhi and adjoining areas on Tuesday, as the air quality deteriorated to "severe" levels, the government body responsible for air quality management said.

The Commission for Air Quality Management said stage three of the Graded Response Action Plan was enforced on Tuesday, "keeping in view the prevailing trend of air quality, and in an effort to prevent further deterioration,"

Under stage three, non-essential construction is banned and curbs on industrial activity using polluting fuels are enforced.

Delhi's air quality index hovered above 400 at several monitoring stations on Tuesday morning, in the "severe" category, as compared with "good" readings below 50, Central Pollution Control Board data showed

The move follows a weekend protest at the India Gate monument where police detained dozens of people demanding cleaner air, a rare public demonstration against pollution in the capital.

Government satellite data showed a rise in crop stubble fires, used by farmers to clear land before the next planting, since the start of November. In the past, such fires have been a cause for high pollution in northern India.

However, the Indian government said the total number of farm fire incidents from 15 September to 9 November were much lower this year than in the past.

Delhi and surrounding districts are often covered in smog during winter, as cold, dense air traps emissions from vehicles, construction sites and crop burning, pushing pollution levels to among the highest in the world and exposing the capital's 30 million residents to severe respiratory risks.

Air pollution has been linked to nearly 15% of deaths in New Delhi according to 2023 study from the Global Burden of Disease. The report says there were around 17,188 deaths connected to bad air quality that year, making air pollution the single largest health risk in the city according to the data.

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