Cheap resources exhaustion calendar
Of course, the calendar is indicative (see the details text).
- between now and 2020 : terbium, hafnium, oil ;
- 2020 -> 2030 : silver, antimony, gold, zinc, indium, tin ;
- 2030 -> 2040 : leed, lithium, tantalum, copper ;
- 2040 -> 2050 : uranium, nickel ;
- 2050 -> 2100 : platinum, gas, iron