Al Gore descovered the truth such as climate change that is inconvenient , maybe he and humanbeing even scientists have not descovered the truth about the link between man behaviors and other new environmental problems including geological disaster exampled by Japanese nuclear plant blast and Chines earthquake in Sichuan province.
So truth consists of two types ,one is inconvenient truth descovered, the other is undiscovered truth itself.
(This is my first English article, please give me advises for my honor.)