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Ecological Footprint
The ecological footprint is a theoretical measurement of the amount of land and water a population (or an individual) requires to fulfil all resource needs and to sequester the carbon dioxide from burning fossil fuels, under prevailing technology. It is measured in global hectares (gha).
Water Footprint
The water footprint is the total volume of freshwater used to produce the goods and services consumed by a person or population, split into green (rainwater), blue (surface and groundwater) and grey (the volume needed to dilute pollution to water quality standards).