"Today’s the day to start thinking about air quality.
What can you do? Pay attention to the Air Quality Index (AQI). The AQI is a tool that tells you when high levels of air pollution are predicted and tells you how air pollution affects your health. Finding the AQI is easy. It’s on the Web, on many local TV weather forecasts, or you can sign up for free e-mail tools and apps. AQI is easy to use. If the AQI predicts a “Code Orange” (unhealthy for sensitive groups) day don’t cancel your plans—use the AQI to help you plan a better time or place for them.
The AQI tells you about five major air pollutants in the U.S. that are regulated by the US Environmental Protection Agency, including ozone and particle pollution. Ozone and particle pollution may harm the health of hundreds of thousands of Americans each year..."Air quailty