Ecological Footprints: Calculators

http://www.epa.vic.gov.au/ecologicalfootprint/calculators/

Victoria's Environment Protection Authority has produced a fascinating interactive resource that students and staff can use to measure 'how much nature we have, how much we use, and who uses it. It shows us how much biologically productive land and water a population (an individual, an organisation, a city, a country, or all of humanity) requires supporting current levels of consumption and waste production, using prevailing technology.'