The IPCC is a scientific organization constrained by political realities.  It represents a middle ground between the opposing scientific and political views on global warming.  And this post interprets the IPCC's work accordingly.

But the real danger of global warming isn't the likelihood that sea level will rise by about a foot in the next century.  We can adapt to that if we have to.  The danger is that a combination of dramatic sea level rise, habitat destruction, and extreme weather events will lead to real catastrophe for our descendants.  By focusing on gradual, manageable changes--and by giving the impression that these changes are predictable--the IPCC understates the case for a serious effort to fight global warming.  Even if there is only a 1% chance of catastrophic climate change, every possible measure should be taken to prevent it.