It calculates your "footprint" you will leave behind when you are gone.
"Footprint" means the number of earths needed if everyone on this planet would live your kind of lifestyle.
I'm scoring a lame 2,9.

I haven't checked the mentioned website yet, the original method may be very simplified or altered there, but ecological footprint should normally be calculated per annum, using data on actual consumption etc., and thus showing your "current" or annual consumption.Duckman wrote:If you die at early age the real result might even be under 1, for example.