“Mythology.” Association of American Geographers, Plenary Session Speaker, Las Vegas, Nevada, March 22, 2009
“Lake Powell and Global Warming.” Santa Monica College, University of California Press Speaker, April 7, 2009
“Lake Powell and Global Warming.” Santa Ynez Valley Natural History Society, Thursday, June 4, 7:30 p.m.
"Skeptic Tanks: How Global Warming Deniers Dupe America." Great Lakes Science Center, Tuesday, November 17, 2009, 7:30 pm