Oct 28 - Bill Sheaffer, Executive Director of the Valley of the Sun Clean Cities Coalition, gave us the history of the coalition as well as many interesting facts about the use of alternative fuel. The Coalition is dedicated to advancing the environmental, energy and economic security of Central and Northern Arizona by advocating and participating in practices that promote clean domestic energy and reduce dependence on conventional petroleum based fuels. It was interesting to learn that Arizona was the first state of have emergency vehicles use propane. Bill suggested that the Alternative Fuels Data Center website contains a wealth of information on alternative fuels.  Bill's presentation prompted a lively question and answer session.