Ed Huntress wrote:

Regarding materials, steel is one of the easiest materials to recycle.
Aluminum is great but extremely energy-intensive to manufacture and costs
several times as much as steel. The aluminum Audi A8 costs a small fortune
and has only a very modest weight advantage over a well-designed steel
equivalent. You may be thinking of the aluminum Lotus Elise, but I hope
you're not -- unless you have more money than brains.


If he has a nickel...


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