>I've not been able to prove it, but I have this suspicion that more
>oil is consumed in the production of food than people realize.
>My bet is that it's more than is consumed by the cars on the road.

Reminds me of a study that was done in NZ at the time of the oil crisis in 
the 1970s, looking at usage of oil in sports. IIRC the study was initiated 
by the University of Canterbury Car Club, to see just how much of the sports 
consumption was by motor sport.

All forms of Motor Sport combined (cars, boats, motor cycles, do not know if 
aeroplanes were included here) came 5th. The leading user, by several 
lengths, was horse racing. 

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