a
UNDP
b
IQAir
c
WHO
d
Greenpeace
Answer and Detail: The correct answer is: IQAir.
Detail: IQAir, a Swiss-based air quality monitoring group, ranked New Delhi as the most polluted city globally based on real-time air quality data. Its “hazardous” level ranking reflects the dangerous concentration of pollutants like PM2.5 in the air.
Detail: IQAir, a Swiss-based air quality monitoring group, ranked New Delhi as the most polluted city globally based on real-time air quality data. Its “hazardous” level ranking reflects the dangerous concentration of pollutants like PM2.5 in the air.