Indian Subcontinent Remains As The Most Polluted Region In The World
Delhi tops the most polluted capital cities list, followed by Dhaka in 2nd position and a higher altitude city like Kathmandu stands on 6th spot.
Air pollution is a global concern that has worsened over the years and the recently released IQAir report 2021 bears testimony to it.
Only 3% of cities and not one nation passed the newest World Health Organization (WHO) PM2.5 annual air quality standard, according to the 2021 World Air Quality Report.
PM2.5 air pollution readings from air monitoring stations in 6,475 cities across 117 nations, are analysed in the paper.
The analysis found that annual
PM2.5 concentrations in 93 cities were more than ten times higher than the WHO PM2.5 standard.
After modifying its standards last year, the WHO now advises that average yearly readings of microscopic and harmful airborne particles known as PM2.5 should be no more than 5 micrograms per cubic metre, claiming that even low concentrations pose substantial health hazards.
The data for this report came from the IQAir real-time online air quality monitoring platform.
Indians are exposed to an average of 83.2 g/cubic metres of PM2.5 particles, compared to a far lower level of merely 8 g/cubic metres in cleaner countries.
When microscopic PM 2.5 particles go deep into lung tissue and as far as the alveoli, poor air quality has a significant impact on the
human respiratory system.
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