![]() ![]() The machine, installed on a mobile van, is supplying data to the Delhi Pollution Control Committee on six pollutants recognised by the US Environmental Protection Agency as vehicular pollutants that can impact human health. On December 15, 2015, instrumentation company Nevco Engineers Pvt Ltd purchased from a New Zealand firm a new mobile air quality sampling machine called Airqual. So why and how has Delhi begun measuring PM 1 concentrations? Studies in the west have shown that PM 1 can lead to premature births and affect foetal development. PM 1, which are so much finer than PM 2.5, can penetrate the cardiovascular stream even further, and give rise to lasting conditions, such as predisposing people to heart diseases. The spike in these particles over the last two years has prompted doctors to advise patients to leave Delhi temporarily. PM 2.5 are considerably finer, penetrate into the lower respiratory tract or deeper in the respiratory tract, and the blood stream, causing cardiovascular problems. PM 10 aggravate symptoms of existing diseases more than triggering new conditions. ![]() PM 10, which are smaller than 10 microns in diameter, enter the respiratory tract, and have been associated with risks like bronchitis, asthma, and upper respiratory tract infections. The finer the particles, the more difficult they are to disperse - and the deeper they can penetrate into the blood stream, causing more harm. ![]()
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