Experts say Ozone levels go up with the rise in temperatures, as the gas is formed from a photochemical reaction which needs high sunlight. “Ozone does not have any source of its own.

According to the CPCB, ozone was the dominant pollutant along with PM 2.5 on February 15, 16, 22, 23, 26, 27 and 28.

Apart from a few pristine summer days last year when PM2.5 levels in Shanghai fell below 25, our city's air quality tends not to be very breathable.

BEIJING - Beijing is to raise the thresholds for issuing its highest air pollution warnings, the state news agency Xinhua reported on Sunday, two months after smog triggered the city's first ever "

India's air pollution levels official overtook China's in 2015, with the average particulate matter exposure exceeding Beijing for the first time in the 21st century.

The Patna high court has directed the environment and forest department to file its reply by March 3 on a PIL regarding increasing air pollution in the state.

MUMBAI: For yet another day, the fluctuations in the city's pollution levels continued as the air quality index (AQI) once again breached the "very poor" mark on Tuesday.

MUMBAI: The city relived last year's most polluted day on Sunday as a dust storm blew towards the suburbs, worsening the air quality drastically.