Modeling climatic effects of anthropogenic carbon dioxide emissions: unknowns and uncertainties. Reply to Risbey (2002)

Willie Soon^1,2,*, Sallie Baliunas^1,2, Sherwood B. Idso³, Kirill Ya. Kondratyev⁴, Eric S. Posmentier⁵

¹Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA
²Mount Wilson Observatory, Mount Wilson, California 91023, USA
³US Water Conservation Laboratory, Phoenix, Arizona 85040, USA
⁴Research Centre for Ecological Safety, Russian Academy of Sciences, St. Petersburg 197110, Russia
⁵Long Island University, Brooklyn, New York 11201, USA