> Oil has a similar pedigree.Its a terrible fuel to generate energy by 
> combusting it. But oil is now used to make plastics,
> pharmaceuticals, illegal drugs, and a million other things, 
> too numerous 
> to identify.  If the primary use of oil is dropped
> (gasoline) the other items will all go up in price, because presently 
> they are "waste byproducts" created at the making
> of gasoline.

That point is worth reading again. Especially as the ag industry has become
more dependant on oil based fertilizers, pesticides and transport.

Over all, any change needs to be gradual, to allow unforeseen consequences
to shake out.

---
James

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