People who live in areas with more nighttime light pollution could be at increased risk of Alzheimer's disease, particularly those in middle age, a new study says.

Newsweek created a light pollution map to show where the light risk factor might be highest in the U.S., where Alzheimer’s is the most common form of dementia. You can find the map here .

The Illinois EPA declared an Air Pollution Action Day in the Chicago metro area. See today's air quality index forecast for Illinois.

The Chicago area had the 15th highest level of ozone pollution and received an F grade. "Unfortunately, too many people in the Chicagoland area continue to live with unhealthy levels of ozone and ...