NO RELIEF FOR DELHI-NCR AS AIR QUALITY STAYS AT SEVERE LEVEL
04, Nov 2019
Prelims level : Environment Mains level : GS-III Environmental Pollution.
Why in News?
- As Delhi chokes, the government has shut all schools till November 5 after a Supreme Court-mandated panel declared a public health emergency in Delhi-NCR.
- Air quality in the national capital saw a sharp dip after Diwali celebrations and has been deteriorating gradually as stubble burning continues in parts of Punjab and Haryana despite a ban.
- The blanket of haze over Delhi continues with the national capital’s pollution levels around the 450-mark.
- The overall AQI in Delhi was 427.
- Pollution levels in the satellite towns of Ghaziabad (496), Greater Noida (496), and Noida (499) were much worse.
AQI (Air Quality Index):
- The AQI is an index for reporting daily air quality.
- The AQI focuses on health affects you may experience within a few hours or days after breathing polluted air.
- EPA (Environment Protection Agency) calculates the AQI for five major air pollutants regulated by the Clean Air Act:
- Ground-level ozone
- Particle Pollution (also known as particulate matter)
- Carbon Monoxide
- Sulphur Dioxide, and
- Nitrogen Dioxide.
- For each of these pollutants, EPA has established national air quality standards to protect public health.Ground-level ozone and airborne particles are the two pollutants that pose the greatest threat to human health in this country.