Government data has also shown that the average level of major pollutants of Delhi has been steadily decreasing in the last few years.
According to the Delhi Economic Survey report, Delhi had the lowest average levels of various pollutants, including PM10, PM2.5 and nitrogen dioxide, since last year 2014.
Government data also showed that the average level of the city’s major pollutants has been steadily decreasing over the past few years.
Annual average concentrations of PM2.5, fine particulate matter that is about 3% of the diameter of a human hair, and decreased from 149 micrograms per cubic meter (/ g / m3) in 2014 to premature death from heart and lung diseases Might be possible. 101 mg / m3 in 2020, it said.
According to the Economic Survey report presented by Deputy Chief Minister Manish Sisodia in the Delhi Legislative Assembly on 8 March, the annual average of PM10 also declined from 324 averageg / m3 in 2014 to 187 ofg / m3 in 2020.
In India, PM6 levels are considered below 40 µg / m3 and PM10 levels below 100 mg / m3.
The report stated that the annual average for PM2.5 and PM10 at all monitoring locations exceeded the prescribed standards.
The annual average concentration of nitrogen dioxide has decreased from 82.45 mg / m3 in 2014 to 40.30 ing / m3 in 2020.
The annual average of carbon monoxide concentrations has increased to 1.27 mg / m3 in 2020. It was 2.07 mg / m3 in 2017, the highest in the past seven years.
The safe limit for CO levels is 2 mg / m3.
However, no significant variation in the annual mean value was observed for sulfur dioxide, which originates during the burning of fossil fuels between 2014 and 2020.
The annual city average for SO2 at all monitoring locations is within the prescribed standard ie 50 / g / m3.
Various studies conducted in the wake of COVID-19-induced lockdown have shown that worldwide air pollution levels have fallen significantly due to reduced traffic and restricted industrial activity.