Oct 9th is overshoot day

"Humanity is living off its ecological credit card and can only do this by 
liquidating the planet's ecological assets," said Dr. Mathis Wackernagel,
Executive Director of Global Footprint Network, "While this can be done
for a short while, overshoot ultimately leads to the depletion of
resources, such as the forests, oceans and agricultural land upon which
our economy depends."

For more about this concept and to look at how many resources you
are using, check out this month's newsletter from the
Ecological Footprint group.