Ecological Footprint Quiz estimates the area of land and ocean
required to support your consumption of food, goods, services, housing, energy and assimilate your wastes. Your ecological footprint is expressed in "global hectares" (gha), which are
standardized units that take into account the differences in biological
productivity of various ecosystems impacted by your consumption
activities.
There are only 15.71 "renewable" global hectares per person, so we overshoot the Earth's biological capacity
by 50%.