Google has teamed up with the British Government to create a couple of really interesting new environmental layers to Google Earth based on climate change estimates for the next century or so.
The first layer, produced from the data supplied by the Hadley Centre depicts CO2 concentrations spanning from November 1999 forward to October 2099. Along the time line, annotated place markers pop up to provide information on the impact of global climate change for specific regions and links to external resources on the topic.
The second layer, utilizing data provided by The British Antarctic Survey, documents the Antarctic ice shelves retreat since 1940 and constructs a projected regression through June 2099. The layer is covered with dates of specific discoveries and documents the retreats of 10 different ice shelves.