Delhi is 9th most polluted city in the world as per WHO

WHO has released details of polluted cities and India is home to four of the five cities in the world with the worst air pollution. While WHO experts admit that India faces a "huge challenge", there are many countries that are so bad that they have no monitoring system and, hence, are not included in its ranking.
This has been reported in news18.com dated 12 May 2016.

WHO has placed Zabol in Iran as the city with the dirtiest air - Zabol suffers from months of dust storms in the summer, and it recorded a so-called PM2.5 measure of 217. The next four cities are all Indian cities namely Gwalior, Allahabad, Patna and Raipur. At 9th place is New Delhi - measured by the amount of particulate matter under 2.5 micrograms found in every cubic metre of air, with an annual average PM2.5 measurement of 122.
These tiny particulate matter can lead to diseases like lung cancer, strokes and heart disease in the long term. Moreover, polluted and poor quality of air can result in health problems and trigger symptoms of heart attacks that kill more rapidly. As per WHO, more than 7 million premature deaths occur every year due to air pollution, and 3 million of them are due to poor quality of outdoor air. The ranking of New Delhi has improved when compared to 2014 because it has tried to tackle its toxic air by limiting the use of private cars on the road for short periods.
Common causes of air pollution are too many cars on the roads, especially diesel-fuelled vehicles, the heating and cooling of big buildings, waste management, agriculture and the use of coal or diesel generators for power.


Image courtesy wikimediacommons.org

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