Science & Environmental Policy Project [2]

SEPP is the creation of atmospheric physicist S. Fred Singer [3], professor emeritus of environmental sciences at the University of Virginia and founding director of the U.S. Weather Satellite Service in the 1960s. SEPP produces a Web site, meetings, and op-eds challenging the scientific mainstream view that human greenhouse emissions are significantly changing climate.

Competitive Enterprise Institute [7]

A policy advocacy organization dedicated to free enterprise and limited government, CEI generally espouses a market-oriented, anti-regulatory agenda and opposes the mandatory emission controls of the Kyoto Protocol.

Sen. James Inhofe (R-OK) [9]

Ranking minority member of the Senate Environment and Public Works Committee, Sen. Inhofe is one of the most outspoken skeptics in Congress.

As scientific evidence has accumulated that the planet is warming and that humans are behind it, many previous skeptics have been won over. There remains a vocal cadre of critics, however, at least some of whose arguments have shifted over the last several years from outright denial that the earth is warming to insisting it's unrelated to human activity — and even if it is, likely nothing much to worry about.

Climate Change: A Guide for the Perplexed [12]

New Scientist magazine takes a shot at debunking 26 common global-warming myths.

Activist Cash [14]

A turnabout on some of the databases above, ActivistCash is operated by the anti-regulatory front group Center for Consumer Freedom. Much of the information comes from the IRS form 990s filed by environmental nonprofit organizations. It also includes information on individual activists and pro-environmental celebrities. Accuses ideological enemies of "false science."

Global Warming Skeptics: A Primer [16]

Environmental Defense ED, an environmental group, assembles the basic facts about the disinformation campaign in a clear and quickly readable form, but also covers some new ground.

The Heat Is Online [18]

This blog-style site is regularly maintained by Pulitzer-winning former journalist Ross Gelbspan, author of two books about fossil-fuel industry funding of climate denialists.

DeSmogBlog [20]

This site, while cast in blog form, includes a searchable database of climate-change denialists. It is run and funded by Canadian PR magnate Jim Hoggan, founder of James Hoggan & Associates, "to clear the PR pollution that is clouding the science on climate change." Timely counter-spin.

ExxonSecrets.org [22]

This searchable database site, run by Greenpeace US, focuses on backgrounding and mapping out the large and complex network of climate-change denial organizations and front groups funded by ExxonMobil. (Full use of site requires Flash 7 player.)