More than 100,000 roamed from east of the Mississippi to the California coast in the time of Lewis and Clark. Today, about 1,000 remain in the Lower 48; one percent of former numbers in one to two percent of their former range. There are five isolated groups in Montana, Wyoming, Idaho, and Washington. These small numbers, coupled with diminishing habitat, resulted in the bear's 1975 listing as "threatened" on the endangered species list.
In the long history of evolution it has not been necessary for man to understand multi-loop nonlinear feedback systems until very recent historical times. Evolutionary processes have not given us the mental skill needed to properly interpret the dynamic behavior of the systems of which we have now become a part. J. W. Forrester, 1971
Tuesday, January 5, 2010
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A Primer on Fossil Fuels and Their Impact on Earth's Oceans
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