Study warns against vehicular pollution

A new report today warned against vehicular pollution in the country, saying if the trend continues it will cause alarming rise of deadly Particulate Matter (PM), which is believed to pose the greatest health risk in the air.
"If the current trends of vehicle population, fuel and emission standards persist, PM 2.5 (PM particles smaller than 2.5 micrometres) emissions will increase by a factor of three, and those of NOx (one of a group of highly reactive gasses) will increase by a factor of five," according to the report.
The report was prepared by The Energy and Resources Institute (TERI), University of California, San Diego (UCSD) and the California Air Resources Board (CARB).

According to the report, titled 'Options to Reduce Road Transport Pollution in India',the transport sector contributes about 15 to 50 per cent of PM 2.5 emissions in cities, and is a dominant contributor to NOx emissions.
The World Health Organization estimates that, of the 67 risk factors studied in its Global Burden of Disease project, outdoor air pollution was ranked 5th in mortality and 7th in health burden in India, contributing to over 6,27,000 deaths and 17.7 million healthy years of life lost in 2010.
The report establishes the scientific basis for reducing emissions, the technologies available, and governance issues that need to be urgently addressed to improve air quality.

The report comes at a time when the transport sector is experiencing significant growth in the country and vehicle population has grown seven-fold in the past two decades. It also presented city-wise contribution in emissions from the transportation sector.

Within the transportation sector, heavy-duty trucks are the largest black carbon (BC) emitters followed by bus, which is followed by three-wheelers. As for PM 2.5, heavy-duty trucks emit most followed by two-wheelers and then three-wheelers.
"City wise, transportation also stands as the largest emitter of PM2.5 in Bangalore (followed by Diesel Generator sets), Pune (followed by secondary formation) and Kanpur (followed by domestic)," it says.

Heavy-duty trucks are large sources of BC and PM2.5 in states such as Maharashtra and Gujarat as well as cities such as Delhi and Chennai. Two wheelers are the largest source of PM2.5 emission in Delhi.