The most strident, the most hysterical warning in An Inconvenient Truth is that the ice on Greenland was melting at a prodigious rate, the meltwater was seeping all the way down to the bedrock on which the ice sat, and we were facing a potential catastrophe when the ice lubricated by this melt water slid off the land and fell into the ocean, creating huge tidal waves and potentially raising sea levels by an astounding 20 feet in short order. (The IPCC view remains a more modest rise of a few inches.)
Thus it should come as a great relief to find that all these claims have been shown to be wrong. The melt water is not seeping all the way down but refreezing part way. The earthquakes that Al Gore thought were evidence of a great pending instability have turned out to due to glacier calving not ice slipping and sliding off the surface. Most significant, the retreat of the glaciers has slowed and may be reversing. They are now back to 2000 levels. And their fastest ice melt remains back in the '30s, before anthropogenic global warming was thought to have started.
UPDATE 5/18: a more recent study concurs. Gore's argument of a catastrophic sliding off of ice is unsupported.

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