Question

What does the U.S. Environmental Protection Agency call the measurement that indicates whether air pollution levels pose a health concern?

Answer 1

Answer:  Air Quality Index

Explanation:

An air quality index can be define as the index which is introduced by the U.S Environmental Protection Agency. It gives idea about how clean or polluted the air is. It helps in forecasting of the air pollution. The elevation in the levels of the AQIs indicates that public is at high risk of respiratory diseases associated with the air pollution.