EDEN IAS

SURGING OZONE

UPSC CURRENT AFFAIRS | TO CHECK SURGING OZONE LEVELS, EXPERTS SUGGEST TACKLING TRAFFIC IN CAPITAL | 08TH JUNE | INDIAN EXPRESS

SYLLABUS SECTION: GS III (ENVIRONMENT AND ECOLOGY)

WHY IN THE NEWS?

In recent months, Central Pollution Control Board (CPCB) has identified SURGING OZONE Levels as a prominent pollutant in Delhi.

DELHI POLLUTION CONTROL COMMITTEE (DPCC) DATA:

  • According to the National Ambient Air Quality Standards Data from the Delhi Pollution Control Committee (DPCC) indicates that ozone levels were well above the 8-hour standard of 100 µg/m3 and hourlystandardof180µg/m3.
  • The geographical spread of ground-level ozone pollution in NCR in the last two months, this year was the highest in the past four years.
  • VOCs can be control through better fuel efficiency.

OZONE:

  • Ozone is a secondary pollutant | Surging Ozone Levels.
  • It forms due to atmospheric reactions among nitrogen oxides (volatile organic compounds) in the presence of sunlight.
  • Nitrogen oxides are emit from vehicles. The VOCs energize nitrogen oxides in presence of sunlight to convert into ozone.
  • Ozone is not directly emitting from any source.
  • The gases that come from vehicles, industries, and power plants… particularly nitrogen oxides and VOCs, under the influence of sunlight and temperature react to form ozone.
  • Nitrogen oxide acts as a catalyst and vehicles contribute the maximum to nitrogen oxide emissions
Volatile Organic Compounds (VOCs)
  • Volatile organic compounds are compounds that have high vapor pressure and low water solubility.
  • (VOCs) are emitt as gases from certain solids or liquids.
  • VOCs are also present because of unburnt hydrocarbons.
  • Sources of Emission:

VOCs are emitt by a wide array of products numbering in the thousands, such as :

  • paints and lacquers,
  • paint strippers,
  • cleaning supplies,
  • pesticides,
  • building materials and furnishings,
  • office equipment such as copiers and printers, correction fluids, carbonless copy paper, graphics
  • craft materials including glues and adhesives,
  • permanent markers
  • photographic solutions.
NATIONAL AMBIENT AIR QUALITY STANDARDS
  • The NAAQS set by the Central Pollution Control Board is applicable to the whole country.
  • The CPCB draws this power from the Air (Prevention and Control of Pollution) Act, 1981.
  • These standards are essential for the development of effective management of ambient air quality.
  • Compliance with the NAAQS is monitored under the National Air Quality Monitoring Programme (NAMP). NAMP is implemented by the CPCB.
  • The current standards (2009) comprise 12 pollutants as follows:
  • Particulate Matter 10 (PM10)
  • Particulate Matter 2.5 (PM2.5)
  • Nitrogen Dioxide (NO2)
  • Sulphur Dioxide (SO2)
  • Carbon Monoxide (CO)
  • Ozone (O3)
  • Ammonia (NH3)
  • Lead (Pb)
  • Benzene
  • Benzopyrene
  • Arsenic
  • Nickel
  • The NAAQS was more technical in nature and was not easy for the common man to comprehend.
  • For understanding the making air quality levels more understandable to the general public.  Air Quality Index was formulated.
  • It was launched in 2014 to measure air quality and rate it in six categories (ranging from good to severe).
  • AQI covers 8 major pollutants, they are all the NAAQS pollutants except benzene, benzopyrene, arsenic, and nickel.

Read more: UPSC CURRENT AFFAIRS

Source: Indian Express