The late Reid Bryson, PhD (Meteorology), the “father of the science of modern climatology” said: “You can go outside and spit and have the same effect as doubling carbon dioxide.”
Reid A. Bryson held the 30th PhD in Meteorology granted in the history of American education. Emeritus Professor and founding chairman of the University of Wisconsin Department of Meteorology—now the Department of Oceanic and Atmospheric Sciences—he became the first director of what’s now the UW’s Gaylord Nelson Institute of Environmental Studies. He’s was member of the United Nations Global 500 Roll of Honor. Bryson was made a Global Laureate by the United Nations Global Environment Program in 1990. http://www.wecnmagazine.com/2007issues/may/may07.html