This is a guest post by David Suzuki.
The Heartland Institute’s recent International Climate Change Conference in Las Vegas illustrates climate change deniers’ desperate confusion. As Bloomberg News noted, “Heartland’s strategy seemed to be to throw many theories at the wall and see what stuck.” A who’s who of fossil fuel industry supporters and anti-science shills...
John Dale Dunn
John Dale Dunn
- J.D., Creighton University, Omaha, Nebraska (1979).
- M.D., Creighton University (1971).
- B.S., biology, Creighton University (1967).
John Dale Dunn is a practicing physician and has worked as a civilian emergency medicine faculty physician at Carl R. Darnall Army Medical Center in Fort Hood Texas since 2003.
From 1989 to 1995 he was an instructor on environmental law at Howard Payne University, in Brownwood, Texas from 1989 - 1995. He has been a reviewer for the Annals of Emergency Medicine since 1991 and of Military Medicine since 2006. 
Stance on Climate Change
“I assert that warm is good for human health and that global warming, even the most extreme estimates, will not create heat illness or death increases and certainly no changes that are more important than the basic public health measures of vector control, water, nutrition, sewage and water quality, and housing quality.” 
“United States Environmental Protection Agency (EPA)-sponsored and funded 'human health effects science' research is unreliable and makes irresponsible and outrageous claims about how air pollution causes thousands of deaths.” 
July 7 - 9, 2014
DeSmogBlog has done in-depth research on the other speakers and sponsors from Heartland's ICCC9, which can be found here.
May 21 - 23, 2012
DeSmogBlog researched the co-sponsors behind Heartland's ICCC7 and found that they had collectively received over $67 million from ExxonMobil, the Koch Brothers and the conservative Scaife family foundations.
March 8 - 10, 2009
Dunn was a speaker at the Heartland Institute's First International Conference on Climate Change.
See his speech below: 
According to a search of Google Scholar, Dunn has published a number of papers in medical journals.
He does not appear to have published any papers related to climate, or climate change and human health.
“Heartland Experts: Dr. John Dale Dunn, M.D., J.D.”, The Heartland Institute. Retrieved May 4, 2012.
“Will human health suffer with Global Warming?”, YouTube Video uploaded by user “Bushvision,” May 20, 2008.
“John Dale Dunn & Steve Milloy: The EPA’s Faulty Science Can Be Stopped,” JunkScience.com, April 20, 2012.
“Proceedings,” The 2009 International Conference on Climate Change. Archived March 12, 2009.
“Scientific Advisors,” American Council on Science and Health. Accessed May 4, 2012.
“Return of Climate Denial-a-Palooza: Heartland Institute Hitches Anti-Science Wagon to Vegas FreedomFest,” DeSmogBlog, July 7, 2014. Archived July 14, 2014.