An ecological footprint is a measure of the amount of Earth's resources required to provide all the stuff we use, such as the food we eat and the house we live in, the fuel to keep us warm and run our car, and the energy to make all the things we buy.
Take the quiz to calculate your ecological footprint.
http://www.earthday.org/take-action/footprint-calculator/
1 Hectare = 1 rugby field
1 Earth = 13 billion global hectares (gha)
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