Health Desk-26th
February, 2020: Bangladesh topped the list of the world’s most polluted
countries in 2019 for PM2.5 exposure, according to an IQAir AirVisual report.
Besides, Dhaka ranked the 2nd most polluted city for the
year as arranged by average annual PM2.5 concentration after New Delhi.
As per the IQAir AirVisual's 2019 World Air Quality Report,
Bangladesh had particulate matter 2.5 (PM2.5) 83.30 μg/m3 on average. The air
was categorised as ‘unhealthy’.
Pakistan, Mongolia, Afghanistan and India occupied the
second, third, fourth and fifth positions respectively.
Of them, Pakistan and Mongolia’s air conditions deteriorated
while the rest three illustrated slight improvements between the years of 2018
and 2019.
The five countries with best air quality are Bahamas, US
Virgin Islands, Iceland, Finland and Estonia with average PM 2.5 of 3.30 μg/m3,
3.53, 5.55, 5.63 and 6.15 μg/m3 respectively.
The 2019 World Air Quality Report is based on data from the
world’s largest centralised platform for real-time air quality data, combining
efforts from thousands of initiatives run by citizens, communities, companies,
non-profit organisations and governments.
It includes only PM2.5 (fine particulate matter) data as
acquired from ground-based air quality monitoring stations with high data
availability.
To track outdoor air quality, the report focused on the
concentrations of two pollutants in particular: fine particle air pollution
(particulate matter measuring less than 2.5 micrometers in aerodynamic
diameter, or PM2.5) and ozone found near ground level (tropospheric ozone).
This assessment also tracked exposure to household air
pollution from burning fuels such as coal, wood, or biomass for cooking.
As per the World Health Organization (WHO), the air pollution
kills an estimated seven million people worldwide every year largely as a
result of increased mortality from stroke, heart disease, chronic obstructive
pulmonary disease, lung cancer and acute respiratory infections.
Courtesy: UNB
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