The trend of warming temperatures isn%27t speculation. It%27s visible in the record of winnowing snowpack%2C melting glaciers%2C low river flows and wildfires. Here%2C in the photos above from Greg Pederson%2C a climatologist with the USGS%2C the retreat and steady disappearance of Boulder Glacier in Glacier National Park is clearly visible.
The trend of warming temperatures isn%27t speculation. It%27s visible in the record of winnowing snowpack%2C melting glaciers%2C low river flows and wildfires. Here%2C in the photos above from Greg Pederson%2C a climatologist with the USGS%2C the retreat and steady disappearance of Boulder Glacier in Glacier National Park is clearly visible.