Thursday 2 May 2013

Impact of CNG and LPG on Air Pollution

 The ambient air quality is monitored in Delhi since 1984-1985 by the Central Pollution Control Board (CPCB). Of late, Delhi Pollution Control Committee (DPCC) is also monitoring ambient air in Delhi. The data on ambient air so collected, is collated, complied, processed and published by CPCB to know the trend. Apart from other sources, the main reasons of air pollution in Delhi are vehicular exhaust emission and re-suspension of roadside dust. Different fuels, i.e., diesel, petrol, CNG, LPG, etc., are used in vehicles in Delhi. There in an decreasing trend in the levels of Sulphur Dioxide in ambient air during 1995-2010 in Delhi due to reduction in sulphur content in diesel, apart from other reasons. This was stated by Shrimati Jayanthi Natarajan Minister of State (Independent Charge) for Environment and Forests, in a written reply to a question in the Lok Sabha today.

She further stated that the introduction of CNG vehicles in Delhi began gradually from the year 1999. By 2003, plying of diesel buses, petrol/diesel three –wheelers and petrol/diesel taxis for public transport have stopped completely. The trend or change in ambient air quality is Delhi pre and post CNG implementation may not be solely attributed to implementation of CNG.

The Minister further stated that the other steps taken by the Government for improvement in quality of air in metro cities includes, tightening of industrial emission norms, management of municipal, hazardous and bio-medical wastes, strengthening air monitoring network, source apportionment studies for particulate matter in ambient air in six cities, strengthening public transport including metro rails in select cities, preparation and implementation of action plans for select cities & critically polluted areas, public awareness, etc, the Minister added.

(22-April 2013)
RM/RS- USQ4410 - LS
(Release ID :94845)

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