Tag: earth

Air Quality Matters – A look at Pittsburgh in the 40s

Corner of Liberty and Fifth avenues at 8:38 a.m. in Pittsburgh in 1940. (Photo: Smoke Control Lantern Slide Collection, ca. 1940-1950/Archives Service Center, University of Pittsburgh. Used with…

The end of Glacier National Park as we know it

Boulder Glacier in 1918 (left) and 2012 (right). CREDIT: USGS Soon, the only glacier in Montana’s Glacier National Park will be in the park’s name, thanks to human-caused global…