How long will the world’s resources last?

The first number (closest to the center) indicates in how many years the particular resource will last at current consumption and production rates.  The second number is how many years the resource will last if humans cut their consumption in half.  In the picture below, NewScientist.com is showing that gold will be completely exhausted in 36 years, 45 if we cut our consumption in half.  It also shows the U.S. annual consumption per capita (per person).