Which city has recently been declared the world's most polluted city?
A) New Delhi
B) Hanoi
C) Paris
D) Dhaka
Answer : B
Description :
Hanoi, the capital of Vietnam, has recently been declared the most polluted city in the world. This dangerous situation was confirmed by data from AirVisual and IQAir, which showed that the concentration of PM2.5 particles in the air has reached well above the safe limit. In particular, PM2.5 levels in the city were recorded at 266 micrograms per cubic metre, 15 times more than the maximum daily exposure recommended by the World Health Organisation.
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