JunkScience.com is a website maintained by Steven J. Milloy , an adjunct scholar at the Cato Institute  and the Competitive Enterprise Institute  and a columnist for FoxNews.com. In the past Milloy was Director of The Advancement of Sound Science Coalition (TASSC ), a front group set up by Philip Morris in 1993 and run by the public relations firm APCO & Associates .
According to Junkscience.com , “Junk science is faulty scientific data and analysis used to advance special interests and hidden agendas.” Steve Milloy has also said  that “'Junk science' is bad science used by lawsuit-happy trial lawyers, the 'food police,' environmental Chicken Littles, power-drunk regulators, and unethical-to-dishonest scientists to fuel specious lawsuits, wacky social and political agendas, and the quest for personal fame and fortune.” Milloy claims that the purpose of JunkScience.com is to “help distinguish good science from bad.” , 
The Consumers Union has defined junk science  as a phrase “coined by those practicing public relations and lobbying activities on behalf of some companies in certain industries–particularly the plastics, chemical, biotechnology, and pesticide industries. While its coiners may have legitimate grounds for debate on some issues, the phrase has been used far too often to discredit honest public interest organizations and legitimate scientists who express concerns about consumer safety and environmental risks.” 
An article in Pr Watch titled “How Big Tobacco Helped Create 'the Junkman'” (PDF)  describes how Milloy “launched the 'Junk Science Home Page' (www.junkscience.com ). Calling himself 'the Junkman,' he offered daily attacks on environmentalists, public health and food safety regulators, anti-nuclear and animal rights activists, and a wide range of other targets that he accused of using unsound science to advance various political agendas.” 
The article also describes a 1999 study by University of Pennsylvania professor Edward S. Herman where he surveyed 258 articles in mainstream newspapers that used the term “junk science.” He concluded that “Only 8 percent of the articles used the term in reference to corporate-manipulated science. By contrast, 62 percent used the term 'junk science' in reference to scientific arguments used by environmentalists, other corporate critics, or personal-injury lawyers engaged in suing corporations.”
Stance on Climate Change
“The relationship between CO2 and temperature is logarithmic in nature – that is, as CO2 increases in the atmosphere, it absorbs less and less additional energy to produce correspondingly less and less additional warming. At some point, adding more CO2 to the atmosphere doesn't significantly change atmospheric temperature.” 
According to Greenpeace's ExxonSecrets , the site was sponsored by “Citizens for Integrity in Science,” a group that existed only on paper and whose website was registered to Milloy's home address in Potomac. 
June 16, 2015
Steve Milloy posted a series of tweets attacking the pope's climate encyclical, calling it “adolescent” and “insipid,” compared the pope's actions to those of the KGB, and called Pope Francis a “people-hater.” Tweets reproduced below:
Have finished the Pope's climate encyclical. Highlights tweeted. Some words that come to mind: adolescent, insipid, primitive, embarrassing.— Steve Milloy (@JunkScience) June 15, 2015 
Pope's Leaked Encyclical: Pope goes full liberation theology – which was invented, BTW, by the KGB. pic.twitter.com/vzcmtpG6wX — Steve Milloy (@JunkScience) June 15, 2015 
Pope's Leaked Encyclical: Oh my, the Pope is quite a people-hater. pic.twitter.com/Ijqsz5qgL3 — Steve Milloy (@JunkScience) June 15, 2015 
In an effort to undermine the credibility of the EPA's Clean Power Plan, JunkScience.com obtained emails from the EPA through the Freedom of Informaiton Act  and claimed that two researchers had falsely claimed a study supporting the EPA's global warming rules was conducted independent of the agency. 
JunkScience.com used a FOIA request to obtain documents from the EPA  and use them to accuse the Environmental Protection Agency of illegally exposing children to exhaust fumes. The Daily Caller describes JunkScience.com as a “government watchdog group.” 
Steve Milloy has strongly opposed the EPA in a number of cases. He is quoted in the Washington Times:
“The EPA is coming for our jobs, electricity and economy. The Obama administration is preparing to make cap-and-trade look like a walk in the park compared to EPA regulation. Its regulatory apparatus is running amok.Cut the EPA’s budget. Cut it in March. Close down the federal government if necessary. Save us now.” , 
May 21 - 23, 2012
“Sacrificing many trillions of dollars of GDP for a trivial, 45-year-delayed and merely hypothetical reduction in average global temperature must be considered as exponentially more asinine than the dot-bombs of the late-1990s and the NINJA subprime loans that we now look upon scornfully.” 
- Advancement of Sound Science Coalition  (TASSC) 
- Cooler Heads Coalition — Member . 
“About Junk Science: FAQs ,” Junkscience.com. Archived February 8, 2009.
“Consumers Union Statement about Consumer Distorts ,” Consumers Union, December 1999. Archived February 1, 2012.
Steven Milloy. “The Greenhouse Myth ,” FoxNews.com, April 20, 2006. Archived July 25, 2015.
“Cosponsors ,” 7th International Conference on Climate Change. Archived June 23, 2012.
“About ,” Globalwarming.org. Archived July 25, 2015.
“About the Publisher, Steve Milloy ,” JunkScience.Com. Archived July 25, 2015.
“What is junk science? ” JunkScience.Com. Archived July 25, 2015.
“Support JunkScience ,” JunkScience.com. Archived July 25, 2015.
Sheldon Rampton and John Stauber. “How Big Tobacco Helped Create 'the Junkman'” (PDF) , PR Watch, Third Quarter 2000, Volume 7, No. 3. Archived July 25, 2015.
“Junk Science: The Global Warming Bubble ,” Fox News, March 20, 2008. Archived July 25, 2015.
“E-mails show Harvard, Syracuse universities, researchers falsely claimed no EPA involvement in Clean Power Plan study ,” JunkScience.com, June 3, 2015. Archived July 25, 2015.
“Report: EPA Tested Deadly Air Pollutants on Children ,” The Daily Caller, January 20, 2015. Archived July 25, 2015.
“MILLOY: Defund the EPA ,” The Washington Times, February 9, 2011. Archived July 25, 2015.
“Junkman’s fantasy: Budget impasse sends 90% of EPA apparatchiks home! ” JunkScience.com, April 8, 2011. Archived July 25, 2015.
“JunkScience.com ,” SourceWatch.
“Junk Science ,” SourceWatch.
“Deniers:Organisations:Junkscience.com ,” ExxonSecrets Wiki.