A proposal to make large quantities of biodiesel fuel in San Francisco has sparked opposition from the city's Green Party. The Greens assert the fuel -- which is in vogue as an eco-friendly alternative to traditional fossil fuels -- actually harms the environment.
The Examiner reported this morning that a facility that renders bones and fat from slaughtered animals into oil is moving to upgrade its facilities to make biodiesel from animal parts, as well as from used cooking oil from local restaurants.
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(The success of the biodiesel fuel industry relies heavily on biodiesel testing <http://www.youtube.com/watch?v=s32Ke2VzrqU>, not only at the production level but at the consumer level, where degraded fuel may cause engine failures.  Of major concern to diesel and biodiesel users is the very real possibility that water has contaminated their fuel. (See http://www.youtube.com/watch?v=0YcczdvPyAk).  The potential catastrophic impact of this problem is discussed at length  in this video at: http://www.youtube.com/watch?v=-lh4qhXc_5s&feature=youtube_gdata.
Fleet Fuel's  family of inexpensive biodiesel test kits  is just a click away on the internet at:
<http://fleetbiodiesel.com/biodiesel_testing_and_supplies.html>)