Most technology uses energy and with tecnology developing at a speed faster than light, it is no surprise then that the sources of energy are depleting faster than anyone might have ever predicted.
Energy resources have been exploited over and over more times than necessary by humans in the past few years and no doubt that a day will come soon enough when the world that we leave for our children would be minus many of these resources-some renewable some non-renewable.
For those born in the the year 2010, it comes about that by the time tthese kinds are in their teenage, reserves of antimony and by the time they complete their second decade of life and step into the third, reserves of gold, iridium, lead and zince and silver will have been depleted. By the time this generation has their kids, the supply of oil will also already have been depleted and so would the reserves of copper ore.