One word: Albedo
(not a comment on Mr. Gore's climate change income)
From the New Zealand Herald:
ZEPPELIN MOUNTAIN - From a remote snowcapped mountain in the European Arctic, you can detect China in the haze.
"Some days we can definitely tell that the air has come from China," said Kim Holmen, research director of the Norwegian Polar Institute, at the station which has spectacular views over fjords, mountains and glaciers of Spitsbergen island....MORE