Black carbon in Delhi air is 5 times more than in US, Europe: Study

Thursday, 12 July 2018, 05:11 Hrs
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delhi If you live in Delhi and commute to work by car, you are up to five times more likely to be exposed to the deadly black carbon than those living in Europe or North America, say researchers.

Increased exposure to black carbon can lead to respiratory and cardiovascular diseases, cancer, and even birth defects.

Various researches have shown that the rapid growth in the number of on-road vehicles in Asia has increased human exposure to particulate matter (PM), a hazardous component of air pollution. 

"There is compelling evidence that people traveling in urban areas in Asian cities are being exposed to a significantly higher level of air pollution," said lead author Prashant Kumar, a professor at UK's University of Surrey.

The study, published by the Atmospheric Environment journal, analyzed exposure to and concentration of particulate matter components, including fine particles (PM2.5), black carbon produced by carbon-rich fuels such as gasoline and diesel, and ultrafine particles (UFP) small enough to travel deep into lungs.

The researchers analyzed how Asians, including Indians, are more exposed to the particulate matter components than those living in Europe and the US. The activities included walking, driving, cycling, motorbike riding and bus rides. 

The findings showed that on-road vehicles in Beijing increased from 1.5 million in 2000 to more than five million in 2014. The number in Delhi is expected to increase from 4.7 million in 2010 to 25.6 million by 2030.

As a result, car drivers in Asia are exposed to up to nine times more pollution than Europeans and Americans, while black carbon levels were seven times higher for Asian pedestrians than Americans. 

Pedestrians walking along busy roadsides in Asian cities are exposed to up to 1.6 times higher fine particle levels than people in European and American cities, the study noted. 

According to a recent World Health Organisation (WHO) data, 14 Indian cities are among the 15 most polluted cities in the world, with New Delhi coming at the sixth spot. About 88 percent of premature deaths in low and middle-income countries in Asia can be attributed to air pollution, WHO said. 

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