3 ms·
Yes, exponentially. http://en.wikipedia.org/wiki/Open-pit_mining http://en.wikipedia.org/wiki/Open-pit_mining http://en.wikipedia.org/wiki/Gold_cyanidation ht
by ivanca 13y ago
Yes, exponentially.
http://en.wikipedia.org/wiki/Open-pit_mining http://en.wikipedia.org/wiki/Open-pit_mining
http://en.wikipedia.org/wiki/Gold_cyanidation http://en.wikipedia.org/wiki/Gold_cyanidation