Lester R. Brown and similar people | Frankensaurus.com
Lester Brown has suggested tin could run out within 20 years based on an extremely conservative extrapolation of 2% growth per year. Tin - Wikipedia The extent of the accessible iron ore reserves is not known, though Lester Brown of the Worldwatch Institute suggested in 2006 that iron ore could run out within 64 years (that is, by 2070), based ...