It’s hard to argue with most visual evidence. So, it’s compelling to see and read some of the evidence amassed by USGS on disappearing glaciers. Not far away glaciers. Instead,  the glaciers in Montana that created Glacier National Park.

During recent years, Dan Fagre and others from USGS  publicized the demise of specific glaciers within the park. Now out is a new, comprehensive book documenting the work of Fagre and others, and the broader effects across ecosystems:  "The Melting World: A Journey Across America’s Vanishing Glaciers" by Christopher White.