Just look at this impressive retreat of the glacier called "la Mer de Glace" in 19 years (1990 to 2009).
On the right side you can read where was the level of the glacier in 1990.
Feel free to watch this well documented website (link
here) dedicated to the retreat of this European glacier... among thousands of others.
Look carefully at the dates between comparative pictures taken from the same point of view.
"Mer de glace" means "sea of ice". It was called like that because it was the most impressive French glacier.
Retreat of the glaciers already create huge works to maintain hydro-electricity production.
On the top of the page of the website, you can watch other glaciers.
Here is another one called "le glacier du Trient"
The first picture was taken in 1981 .
and the second one in the middle of the 2000
