Who is Dr. Patrick Michaels?
Until 2007 he was research professor of environmental sciences at the University of Virginia, where he had worked from 1980. He is also the past president of the American Association of State Climatologists. (Wikipedia)
This video interview of him is maybe the best summation I have seen on whether there is a Human Caused Catastrophic Global Warming issue.
He also debated Bill Nye on CNN on the issue of science cover ups and the anti free speech movement within the pro global warming community.