Cities are already a major source of raw materials, recycling more than 400 million tonnes a year of paper and metal from their urban ore. In some particularly good countries more than 90 percent of their discarded aluminum cans are ‘mined’ and recycled into new aluminum. In a few cities, old landfills have even been mined to recover past discarded metals. Another link between cities and the mining industry might be replicating contests held by two important mining companies.
In March 2000 Goldcorp announced a very unusual challenge. The company offered $575,000 in prize money, plus put all of its usually highly proprietary geologic data for its Red Lake, Canada property on line. The company needed help on where best to next look for gold. More than one thousand virtual prospectors from more than 50 countries responded. Their suggestions were prescient and highly profitable. The contest took a small niche gold mining company and made it a global player: share prices increased more than 50-fold since 1993.