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1. Saudi Arabia

Rank 1. Saudi Arabia
108 micrograms of PM 2.5 per cubic meter

Do not 'take a deep breath' in these countries: Most polluted countries

Bangladesh, Kuwait, Libya are among the top cities that have drawn attention for their dangerously high air pollution levels in 2017 – but they’re not alone. The World Health Organisation (WHO) has confirmed that 80% of the world’s urban population now live in cities where the air is toxic. This survey is based on a key indicator is called ‘PM 2.5’ — one of the most harmful classes of airborne pollutants. The ‘PM’ stands for ‘particulate matter’ and the 2.5 refers to the diameter size of 2.5 microns of a single bacterium.

India is steadily approaching China in the number of deaths caused due to air pollution. Here’s a look at the most polluted countries in the world.

Note: The figures are micrograms of PM 2.5 per cubic meter

(Source – World Economic Forum; image credits – Getty Images)
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