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India tightens pollution controls as Delhi's air becomes worse

India has tightened its anti-pollution policies in Delhi and the surrounding areas, after the capital's air quality reached the worst of the season.

According to an advisory from India's Environment Ministry, the Commission for Air Quality Management (CAQM)?used?stage four, which is the highest level of the Graded Response Action Plan for Delhi & surrounding areas, on Saturday evening.

Central Pollution Control Board (CPCB) data revealed that Delhi's air quality on Sunday was "severe", with index readings of over 450 at a number of monitoring stations. This is up from 430 the previous day and represents the highest level so far in this winter. Readings below 50 are considered "good".

The curbs prohibit the entry of "older diesel trucks", suspend construction projects, including public ones, and mandate hybrid education.

Winters in this area of 30 million people are often plagued by smog, due to the cold, dense air that traps the emissions from construction sites, vehicles and crop burning. This pollution is among the worst in the world, and exposes residents to respiratory problems.

Authorities urged residents to remain indoors and consider wearing masks when going outside, particularly children and people with respiratory and cardiac problems.

According to the Commission for Air Quality Management, the worsening air quality is due to high humidity and a?shift in wind direction. These conditions prevent dispersion and encourage smog formation. Reporting by Sethuraman N.R.; Editing and proofreading by William Mallard

(source: Reuters)