Fred Singer, from Virginia, suggested that there was currently little hard evidence to link ozone depletion with man-made chemicals, whose effects, he suggested, may be"very, very small.

Additionally, high costs of decreasing emissions may cause significant production to move to countries that are not covered under the treaty, such as India and China, says Fred Singer.

Witnesses included Fred Singer, whose statement cited the Oregon Petition against the Kyoto Protocol to claim that his skeptic views on human causes of climate change were not fringe.

In particular, Fred Seitz, Fred Singer, and a few other contrarian scientists joined forces with conservative think tanks and private corporations to challenge the scientific consensus on many contemporary issues.

They include the Science and Environment Policy Project, founded by Fred Singer, a physicist noted for opposing the mainstream view of climate science.

The Marshall Institute and Fred Singer, two of the subjects, have been critical of the book, but most reviewers received it favorably.

He approvingly quotes the work of the Nongovernmental International Panel on Climate Change (NIPCC), run by Fred Singer.

Fred Singer - Keys (Hard Attack)

"The Denial Machine", Fifth Estate, featuring Fred Singer, November 15, 2006.

The signers are generally described by Fred Singer and his supporters as climate scientists, although the current signers also include 25 weather presenters.