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GK MCQs Section
Q. Which of the following range of Air Pollutant Index is considered as hazardous?
Answer: 301-500
Notes: An Air Quality Index (AQI) of 301-500 is considered as hazardous to human health. It denotes the severely polluted state of air. AQI values over 300 trigger health warnings of emergency conditions. The entire population is even more likely to be affected by serious health effects.

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