Ball worked with
Friends of Science and Natural Resources Stewardship Project, which oppose the scientific consensus of significant anthropogenic
global warming, and is a former research fellow at the
Frontier Centre for Public Policy. Ball also rejected the scientific consensus on climate change, claiming that "
CO2 is not a
greenhouse gas that raises global temperature." Ball rejected the
scientific consensus on climate change and stated that he believed global warming is occurring but that human production of
carbon dioxide is not the cause. Ball rejected not only greenhouse gas–induced climate change but the existence of the
greenhouse effect itself. He reiterated the view that man-made global warming was fabricated by the environmental movement, particularly
Environment Canada, in a presentation he gave in June 2006 to the
Comox Valley Probus Club. Ball was also a frequent guest on
Coast to Coast AM, an alternative media radio show. On 21 July 2011, while a guest on the show, he stated: "To suggest that 's a pollutant when it's an extremely important gas in the atmosphere for all plant life and therefore for the oxygen that's produced, is just nonsense." He is also one of the signatories of the
Manhattan Declaration on Climate Change. Ball also, along with
Tom Harris, argued that the
National Climatic Data Center misleads the public by announcing premature results from their temperature datasets based on incomplete data, and then quietly updating the data when they gain access to all of it, usually diminishing the warming trend in doing so. He also wrote about
ocean acidification from a similarly dismissive point of view, arguing that "Even if increases to 560 ppm by 2050, as the IPCC predict, this would only result in a 0.2 unit reduction of pH. This is still within the error of the estimate of global average [which is 0.3 units]." Ball also said that since he became a vocal opponent of the consensus position on global warming, he received five death threats.
Michael E. Mann called Ball "perhaps the most prominent
climate change denier in Canada." The
Frontier Centre for Public Policy, a Canadian think tank, states that Ball disputed
anthropogenic global warming since the mid-1990s, and asserted that global warming is due to natural variations. Ball spoke twice at
The Heartland Institute's
International Conference on Climate Change, where he was presented as a former climatology professor at the University of Winnipeg. However, critics pointed out that Ball was a professor of geography, not climatology, and that the University of Winnipeg never had a climatology department. Ball replied that the climate program at The University of Winnipeg was part of the geography department in the early 1980s. He also asserted that websites such as
DeSmogBlog made false charges about his credentials and professional qualifications. From 2002 to 2007, Ball wrote 39 opinion pieces and 32 letters to the editor in 24 different Canadian newspapers, and from 2002 to 2012, he gave over 600 public talks about global warming and various environmental issues. In 2007 Ball appeared on
The Great Global Warming Swindle, an hour and a quarter-long British television documentary that aired on
Channel 4 and that was described as a "deceptive and propagandist portrayal of the science of global warming". Also in 2007, he participated in
Exposed: The Climate of Fear, a special presentation of the
Glenn Beck Program, with
Patrick Michaels,
John Christy, and other
climate deniers. In 2010, he appeared on the
Michael Coren Show. == Controversies and lawsuits ==