Vergent - ritter - Shared Humanity:
The items you discuss may be the "wake-up" events to cause more action.
While I truly believe Arctic Sea Ice is the Canary in the Coal Mine
and increasing heat may cause the population of Phoenix to decrease
the other areas noted by ritter are just to valuable to for me too
really comprehend.
With San Diego and Los Angeles being located near the ocean increasing
heat may not be as severe as for places inland such as Phoenix.
Sea Level Rise may be more devastating to them - providing FRESH WATER
for drinking and agriculture can be supplied.
San Diego is in the process of starting to build Desalination Plants(s) for sea water
http://www.nbcnews.com/id/50032981/ns/us_news-environment/#.UUcmLBdzA7o and already using desalination of ground-water
http://www.sdcwa.org/groundwater There is opposition
http://www.sdcoastkeeper.org/learn/san-diegos-water-supply/desalination.htmlDue to the high cost of energy for desalination hopefully it will be
a force to utilize photovoltaic or other solar
http://en.wikipedia.org/wiki/Solar_power_in_California for more drinking water and eventually some agriculture use.
Will the people remaining in Phoenix be willing to pay USD$10.00 for
a head of lettuce or $20.00 for a pound (0.5 kilo ) of tomatoes?