Refer to court ruling 7

Gore says, “We are facing what biologists are beginning to describe as a mass extinction crisis, with a rate of extinction now 1,000 times higher than the normal background rate.”

Here Gore’s hobgoblin is speculative in that he does not say what the normal background extinction rate is, how it is measured or on what evidence the estimated increase is based.  Estimates of the actual number of species in the world range from 1.6 million to 80 million, this whole subject is fraught with uncertainty and guesswork.

Also claims of a warming-induced “mass extinction crisis” do not survive inspection either.

Patrick Michaels, “Extinguishing Mass Extinction,” World Climate Report, March 31, 2004.

The observed relationship between habitat loss and species loss on small islands is often assumed to hold for much larger areas. Thus any reduction in “species area,” whether due to deforestation or climate change, will result in a corresponding number of extinctions. But as Bjorn Lomborg points out:

“If islands get smaller, there is nowhere to escape. If, on the other hand, one tract of rainforest is cut down, many animals and plants can go on living in the surrounding areas. One obvious thing to do would be to look at our own experiment, the one carried out in Europe and North America. In both places, primary forest was reduced by approximately 98-99 percent. In the U.S., the eastern forests were reduced over two centuries to fragments totalling just 1-2 percent of their original area, but nonetheless this resulted in the extinction of only one."

See Bjorn Lomborg, The Sceptical Environmentalist: Measuring the Real State of the World Cambridge University Press, 2001. P252.

Also Lomborg’s website