Global Warming WILL change things around. We can kiss the boardwalk in Venice Ca. goodbye but then it will be a better world without it. Coastlines will change. Venice Italy is probably history. It won't be the end of the world. Alaska will be a much more inviting place. Change is good. It'll be fun.
Of course as we see our shipping ports destroyed the Europeans will become vegetarians and the South Americans will become carniovres and the Asians will . . .(starve) but God bless America things won't change all that much unless some other countries start launching intercontinental missiles in their pursuit of resoures.
IT WILL BE FUN!
Coastlines have always changed, mostly due to errosion. Venice is safe for a long time. For as much as they spew about the oceans rising, despite over 100 years of mans assult on the global climate with greenhouse gases, oceans have yet to rise one inch. Oceans are at the same levels they were 150 years ago. They have just asserted this claim so many times, people assume it is true.
Alaska will become a desert. It already would be a dusty desert except for the permafrost, and when the permafrost is gone the one foot a year of precipitation won't amount to much.