This map shows a day when the air quality was bad. See the area in red? That shows unhealthy air quality. Wildfires in Quebec, Canada made the air unhealthy.
Photo Credit: AirNow/U.S. Environmental Protection Agency
In the Know
Celebrating Hispanic Culture and Art
This painting covers a whole wall in Chicago. It is … read more
In the Know
What Is Archaeology?
How do we find out about the lives of people … read more
In the Know
Hiking Tips for National Trails Day
National Trails Day is June 6, 2020. It’s a great … read more