Some people still wont believe, or say its not due to human activity but to be honest after fifteen years of interest in the subject and countless debates , i don't care and neither does this chart

Nor do these images

Muir Glacier and Inlet, Alaska, Mid 1890s and 2005
Muir Glacier and Inlet, Alaska, 1880s and 2005
Pedersen Glacier, Alaska, ~1930s and 2005
Grinnell Glacier Overlook, Montana, 1920 and 2008
Carroll Glacier, Alaska, 1906 and 2004
Iceberg Glacier, Montana, ~1940 and 2008