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What is the maximum permissible limit of PM2.5 ...
What is the maximum permissible limit of PM2.5 in ambient air as per WHO?
A. 10 µg/m³
B. 25 µg/m³
C. 40 µg/m³
D. 50 µg/m³
Explanation:
WHO recommends a limit of 10 µg/m³ for PM2.5.
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