Hint: The most polluted city of the world is well known for its ‘120-day wind’, which is a highly persistent dust storm in the summer. This city lies on the border with Afghanistan and has a hot desert climate.
Complete answer:
> Option (A) is correct. The most polluted city in the world is Zabol. According to the World Health Organization in 2016, the city that was ranked to the top for having the world’s dirtiest air was Zabol, a city in Iran. This city is well known for its ‘120-day wind’ and lies on the border with Afghanistan.
> Option (B) is incorrect. According to the ranking of WHO in the year, Calcutta city of India was not marked in the most polluted cities in the world.
> Option (C) is incorrect. According to WHO in the year 2016, Zabol had the highest annual mean concentration of the fine particulate matter that has a diameter of less than 2.5microns. Thus, Tokyo was not the most polluted city in the world.
> Option (D) is incorrect. New York being the most populous city in the United States has relatively clean air on average. Thus, it is not the most polluted city in the world.
Hence, the correct answer is option (A).
Note: The most polluted city of the world was Zabol, Iran according to the WHO in the year 2016. It was regarded as the most polluted city because of the presence of the worst air quality as the air contained fine particulate matter of diameter less than 2.5microns. The concentration of the particulate matter in the air was also 20 times higher than that mentioned in the WHO’s guidelines.
