New Delhi, June 4 -- The Commission for Air Quality Management (CAQM) on Wednesday issued new directions that tighten emission norms for a wide range of vehicles entering Delhi, a city that suffers from high levels of air pollution.

According to the World Air Quality Report 2024, published in March by IQAir, a Swiss air quality technology company, 13 of the world's top 20 most polluted cities are in India, with Byrnihat in Assam topping the list, followed by Delhi.

From 1 November 2026, only buses running on BS-VI diesel, CNG, or electricity will be allowed into Delhi under service regimes such as contract carriage, school or institutional permits and All India Tourist Permits, as per a government notification issued by the ministry of ...