Jinx wrote:

> IOW, is aluminium *really* cost-effective for the motorist ?

All those questions boil down to that we have a reasonable (well, more or
less :) public financial bookkeeping because of taxes, but we don't have
any whatsoever about real resources. Data about actual resource usage of
processes are almost impossible to get by because of this. I don't think
the moment is far away where resource usage often is more important to know
than the financial situation, in terms of public policies, and resource
bookkeeping (or at least thinking about it) would be the logical
consequence.

Gerhard

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