Here is a list of things that Rate-o has reviewed with category Ore deposits:  

number of years of ore left at current rate of use of nickel, number of years of ore left at current rate of use nickel, number of years of ore left at current rate of use nickel, number of years of nickel ore left at current rate of use, number of years of nickel ore left at current rate of use, number of years of nickel ore left at current rate of use nickel, number of years of nickel ore left at current rate of use nickel, nickel ore