The EPA's Air Quality Index can tell you whether breathing outside air can be harmful. Here's how to read the scale to plan accordingly in Michigan.

The U.S. Air Quality Index (AQI) is the Environmental Protection Agency’s tool for reporting outdoor air quality and health.

Knowing how to read the EPA's Air Quality Index can help you understand whether smoke from numerous Canadian wildfires makes it hazardous to breathe outside air. "The AQI is an index for reporting ...

The EPA's Air Quality Index can tell you whether breathing outside air can hurt you. How to read the scale.

Wildfires in Canada are sending heavy smoke across the northern U.S., and New Jersey is experiencing some unhealthy air ...