Uniform implementation of Bharat Stage –IV and V norms by 2020 can improve air quality, says TERI study
As
per a TERI (The Energy Research Institute) study, a uniform
implementation of Bharat Stage (BS) IV norms and of BS V norms by 2020
across the country can improve air quality and health of city dwellers.
TERI
compared a business as usual (BAU) scenario with three alternative
scenarios when fuel emission norms upgraded to BS IV and V have been
assessed with PM 2.5 levels (fine respirable particles) and NOx
(nitrogen oxides) levels.
The study
concluded that in a BAU scenario the PM 2.5 levels will almost treble
and NOx levels will be six times current levels. But if BS IV is
implemented throughout the country by 2015 and BS V is introduced by
2020 then PM 2.5 and NOx levels can be limited to a level slightly
higher than the current levels. As of now only 13 cities including Delhi
have BS IV standards but since trucks that travel through states and
those with BS III norms may pollute BS IV cities too.
Researchers
from Teri and The International Council on Clean Transportation (ICCT)
have recommended, among other things, adoption of BS V fuels and
vehicular emission standards by 2017 to deal with air pollution levels.
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