Humans consume the products and services of nature;every one of us has an impact on the earth.Does the human load stay within global carrying capacity?The ecological footprint concept has been designed to answer this question.The ecological footprint of any defined human population(from a single individual to a whole city or country)is the total area of ecologically productive land and water occupied exclusively to produce all the resources consumed and to assimilate all the wastes generated by the human po...