Most of the world’s mountain glaciers are either totally melted or reduced significantly in size. For every one of these glaciers, there’s somebody who will tell you that that particular glacier has disappeared or is disappearing for some reason that has nothing to do with anthropogenic global warming. Once, some guy tried to convince me that one of the world’s major tropical glaciers was melting away as a result of global cooling.
It used to be that I thought of people like that as poorly informed. Then, I changed my mind when I realized that you can’t be THAT poorly informed, and that you must be either some sort of idiot or a person with very questionable motivations and a strong dishonest streak to support such ideas. But those times have gone by as well. Even people who for a log time denied the reality of anthropogenic global warming, and in particular the significance of the startling fact that the world’s mountain glaciers are all either reduced or gone (with one single exception that I know of), have stopped saying that. The only people left are the crazy ones. You have to be absolutely nuts to think that global warming is not real, human caused, and responsible for the melting of all that ice.
I’m reminded of all this by the following photograph that NASA just sent me:
The retreat of Pedersen Glacier in Alaska. Left: summer 1917. Right: summer 2005. Image credit: 1917 photo captured by Louis H. Pedersen; 2005 photo taken by Bruce F. Molnia. Source: The Glacier Photograph Collection, National Snow and Ice Data Center /World Data Center for Glaciology
NASA posted this because Earth Day is just around the corner.
My question for you is this: Why is it that the first Earth Day was decades ago but we’ve done almost nothing to address global warming?