In 2009 Marc Morano became the executive director and chief correspondent of ClimateDepot.com, a project of the Committee for a Constructive Tomorrow (CFACT), a conservative think-tank based out of Washington D.C. Morano's blog Climate Depot regularly publishes articles questioning man-made global warming.

Morano has been called "the Matt Drudge of climate denial", the "King of the skeptics," and a "central cell of the climate-denial machine." He was also listed as one of 17 top "climate killers" by Rolling Stone Magazine.

From 2006 to 2009 Morano was the communications site director for Senator James Inhofe (R-OK), the minority chair of the Senate Environment and Public Works Committee.

Morano's profile at the Heartland Institute reads, "Morano joined the Senate Environment and Public Works Committee as the majority Communications Director in June 2006 after a decade and a half as a working journalist, documentary maker, radio talk show host, and national television correspondent." Apart from being a regular speaker at the Heartland Institute's International Conference on Climate Change, Morano is also listed on their website as a "global warming expert."

Prior to working for Senator Inhofe, Morano was a journalist with Cybercast News Service, which is owned and operated by the Media Research Center (MRC). From 1992 to 1996, Morano also worked as a producer for the Rush Limbaugh Television Show and was known as "Limbaugh's man in Washington." Morano often appears on Fox News to speak on climate change.