The trend of warming temperatures isn't speculation. It's visible in the record of winnowing snowpack, melting glaciers, low river flows and wildfires. Here, in the photos above from Greg Pederson, a climatologist with the USGS, the retreat and steady disappearance of Boulder Glacier in Glacier National Park is clearly visible.
The trend of warming temperatures isn't speculation. It's visible in the record of winnowing snowpack, melting glaciers, low river flows and wildfires. Here, in the photos above from Greg Pederson, a climatologist with the USGS, the retreat and steady disappearance of Boulder Glacier in Glacier National Park is clearly visible.