ON-Lion Letter
One of the great horror stories associated with predictions of CO2-induced global warming is that the warming will be so fast and furious that many species of plants and animals will not be able to migrate towards cooler regions -- poleward in latitude, or upward in elevation -- at rates that are fast enough to avoid extinction.  But is this claim true? 

The scientific evidence suggests otherwise, according to an insightful new book from the Science and Public Policy Institute (SPPI) in Washington, D.C.  "[A] substantial body of research indicates that the vast majority of the predicted extinctions will not occur," write Drs. Craig D. Idso and Sherwood B. Idso in CO2, Global Warming and Species Extinctions:  Prospects for the Future.

Craig D. Idso, a former director of environmental science at Peabody Energy in St. Louis, is the founder and chairman of the Center for the Study of Carbon Dioxide and Global Change (CSCDGC) in Tempe, Ariz.  Sherwood B. Idso, a former research physicist with the U.S. Department of Agriculture's Agricultural Research Service at the U.S. Water Conservation Laboratory in Phoenix, is CSCDGC's president.

"This is primarily because in a CO2-accreting atmosphere," the Idsos say, "most plants prefer warmer temperatures, so that while warming gives the the opportunity to move poleward in latitude and upward in altitude at the cold-limiting boundaries of their ranges, it does not mandate that at the heat-limiting boundaries of their ranges they must move in these directions.

"Consequently, with the greater over-lapping of plant species ranges that these phenomena portend for concomitant increases in atmospheric temperature and CO2 concentration, there should be a tendency for regional plant species richness to actually increase throughout the world," they continue, "and this same type of range overlapping will likely apply to many of the world's animals that rely upon these range-expanding plants for their food and habitat."

The Lynde and Harry Bradley Foundation in Milwaukee supports SPPI.
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