ArielI'm not convinced that climate change will be such a disaster for the Earth as many make out.  As you say seas move around, so do deserts and forests.  Climate is continually changing, species rise and fall and some go extinct, it's Nature.

I was watching a program about Africa and its wildlife recently, it showed that the jungles have expanded and contracted for millions of years without mans interventions.

It's well documented that North Africa was wet, fertile and inhabited by animals now confined to the southerly plains into Roman times.  

If we are changing the climate quicker than usual I suspect that it is us that will experience the disaster as the Earth self-corrects.  Archeology in South America reveals that the collapse of most of the civilisations there was brought about by the rapid expansion of population, cultivation and chopping down of the forest.  

We are doing the same on a global scale again but as in South America the break-down of the ecology that was a disaster for humans will happen before we have completely wiped out everything else.  With most of the humans gone the small pockets of the "Natural" world will expand again covering our cities as it did the Mayans.