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>>nearly all of the copper mined at the time of the pharaohs is still in use. Source?
by _exec 14y ago
>>nearly all of the copper mined at the time of the pharaohs is still in use.
Source?
- jacques_chester 14y agoAny physics textbook. Look up "conservation of mass".
- Tuna-Fish 14y agoAccording to the International Copper Association, more than 80% of all copper ever mined is still in active use. Copper doesn't materially degrade in use -- used material can simply be recast or rewrought for a new use.