-The Hindu Chennai had the highest proportion of ‘severe’ days based on AQI Official air quality data for the first half of this year shows that while Delhi does indeed face high levels of air pollution, Kanpur, Varanasi and Chennai are worse off. Averaging across the ten pollution monitoring stations in the city, a little over a quarter of the days from January to June this year in Delhi had an Air Quality...

-The Times of India NEW DELHI: Day temperatures dropped marginally on Thursday but there was hardly any relief for weather-beaten Delhiites as toxins in the air rose alarmingly due to a cloud cover trapping pollutants. The capital's air quality index (AQI) breached the 'severe' level, going from 219 (poor) on Wednesday to 410 in one of the sharpest single-day spikes in recent months. Fine particle pollution (PM2.5) that AQI measures wasn't the...

-The Hindu Index to provide data on level of pollutants in 10 cities across India Amid growing concerns over deteriorating air quality in India's major cities, the government on Monday launched the National Air Quality Index (AQI) that will put out real time data about the level of pollutants in the air and inform people about the possible impacts on health. Launched by Prime Minister Narendra Modi during the two-day conference of Environment...

-The Times of India NEW DELHI: The sustained anti-firecracker campaign, clampdown on Chinese crackers and a 10pm deadline do not seem to have made the city breathe any easier this Diwali than during the last one. There was no significant improvement in air quality compared to last year. The range of average PM 2.5 (fine, respirable particles) may have reduced from 201-533 microgram per cubic metre last Diwali to 145-500 microgram per...