Haze collected over the Great Lakes region at the end of July 2007. The Moderate Resolution Imaging Spectroradiometer modis.gsfc.nasa.gov/ (MODIS) flying on NASA's terra.nasa.gov/ Terra satellite captured this image on July 31. In this image, the haze appears as a blue-gray film, thickest over northern Michigan and Lake Superior. Haze also obscures the view of Lake Huron and Lake Erie.