Most people do not understand exponential growth, yet the concept is of fundamental importance. Lecture by Dr. Albert A. Bartlett, professor emeritus of Physics at the University of Colorado-Boulder

See also: http://en.wikipedia.org/wiki/Exponential_function

Part 1: http://edutube.org/en/video/arithmetic-population-and-energy-part-1-8
Part 2: http://edutube.org/en/video/arithmetic-population-and-energy-part-2-8
Part 3: http://edutube.org/en/video/arithmetic-population-and-energy-part-3-8
Part 4: current video
Part 5: http://edutube.org/en/video/arithmetic-population-and-energy-part-5-8
Part 6: http://edutube.org/en/video/arithmetic-population-and-energy-part-6-8
Part 7: http://edutube.org/en/video/arithmetic-population-and-energy-part-7-8
Part 8: http://edutube.org/en/video/arithmetic-population-and-energy-part-8-8

Original description:
Part 4 of Dr. Albert A. Bartlett's presentation on "Arithmetic, Population, and Energy." Entire playlist for the lecture: http://www.youtube.com/view_play_li...