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World Health Organization-WHO has published a detailed report on the value of air in 792 cities of 67 countries, where Bangladesh's capital city is third in terms of pollution among megacities.

The report, published on Tuesday, shows that in 2016, the average average amount of 104 microgram of floating particles (PM10) of 10 micrometres per cubic meter air in Dhaka In 2015, 145 micrograms and 150 micrograms in the previous year.

The average average amount of air circulation of 2.5 micrometres (PM 2.5) per cubic meter is 57 micrograms in 2016, 82 micrograms in 2015 and 85 micrograms in the previous year.

According to the WHO standards, the PM10 is less than 20 micrograms per cubic meter and less than 10 micrograms of PM 2.5 is called a healthier air.

The average pollution graph of WHO has been released by 11 megacities of more than 14.4 million people, from 2011 to 2015, the WHO has released the WHO, Dhaka is the third place in India after Cairo and Egypt in Cairo.

The particulate matter (particulate matter or PM) in the air is measured in microgram (ppm-parts per million) in every cubic meter. Researchers calculate the risk based on their quantity by dividing these fissile into 10 micrometres and 2.5 micrometres in diameter.
WHO says 80 percent of the inhabitants of the world's urban areas are breathing in the air, they do not fall within that healthier range. 98 percent of low and middle-income countries are at risk due to air pollution.

Due to increased air pollution, the risk of heart disease, stroke, lung cancer and respiratory diseases is increasing in these areas.

Narayanganj situation in Bangladesh is worse than Dhaka. However, the data of Narayanganj was not available in 11 cities of the World Health Organization due to not being in the megacity.

In the city of Shitalakshya, in 2015, the amount of PM 2.5 is 94 micrograms per cubic meter; The presence of PM10 is 205 micrograms per cubic meter.

However, this year's report of any other city of Bangladesh, except Dhaka, was not reported in the WHO report.

According to the 2015 data, the presence of small floating particles in the eight air masses of the country is in dangerous levels. Among the city corporations, the air of Chittagong is comparatively better, but the level of pollution is higher than the safe levels indicated by WHO.
The second largest city in Bangladesh, the amount of PM 2.5 per cubic meter is 66 micrograms. The presence of PM10 is 91 micrograms per cubic meter. In Khulna, Gazipur, Barisal, Sylhet city air pollution is also a few times more than the safe level.

According to WHO, 13 of the world's 20 densely populated cities in terms of PM10 pollution In addition to Delhi, loads of air pollution in Mumbai, Pune and Kolkata.

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