The all important Bees in the Biodiesel equation
Br Dr Garth Cambray

Albert Einstein once said, "if bees were to disappear, man would only
have a few years to live ". This statement was based on the fact that
humans require bees to pollinate many of the crops we rely on for
food. As most flowering plants are pollinated by bees a loss of these
valuable pollinators means losing food. Looking further ahead, this
may also mean a loss of fuel.

http://www.scienceinafrica.co.za/2007/april/beesbiodiesel.htm