When he dealt with Mount Kilimanjaro, he showed a very old photo, with much ice at the top; fairly recently, with very little; and more recently, with virtually none. I was sitting in the movie with Mike to my right. (He had stood to my right as we had our pictures taken at the highest point on Mount Kilimanjaro in February 2004.)
(Mike took a photo of Mount Kilimanjaro this year, which reveal that, while the ice at the top may be gone, much remains near the top. Most scientists agree, however, that that ice will be gone in 10-20 years.)
While Gore explained how global warming was creating stronger hurricanes and flooding, he also explained the paradox that other areas will experience severe drought. Similarly, as most glaciers in the world are retreating (becoming smaller each year) some are advancing (becoming larger annually), as this BBC educational site confirms.