Civil Services UPSC Mock Test Series 2025 (Prelims + Mains) General Knowledge Ecology and Environment Environmental pollution
Consider the following statements regarding the WHO Air Quality Guidelines:
1. The guidelines provide recommended air quality levels for a total of nine pollutants.
2. According to the guidelines, the annual mean of PM2.5 should not exceed 15 µg/m³, and the annual mean of PM2.5 should not exceed 5 µg/m³.
Which of the statements given above is/are correct?
1
1 only
2
2 only
3
Both 1 and 2
4
Neither 1 nor 2