The concept of ecological footprint was developed by William Rees and Mathis Wackernagel in 1990 and it refers to the amount of productive land and water that people in a particular part of the world need to provide them with an indefinite life. supply of renewable resources while recycling all waste and pollution linked to the use of these resources. In other words, it tracks the demands of humans living off Earth's natural resources by region, country and individual. The Global Footprint Network is a non-profit organization established in 2003 with the aim of enabling a sustainable future that would enable all humanity to live satisfying lives within the supply capabilities of a single planet. They do this by measuring human impact on Earth's natural resources, using the ecological footprint, to better inform the use of these resources and create ways to prevent their overuse and depletion. They use the fingerprints like one would use a bank statement, tracking withdrawals and deposits to see if different regions, countries and individuals are living within their ecological budgets or if they are overdrawn, using resources faster than the Earth cannot be reconstituted and in larger quantities. For example, today, as a whole, humanity is overshooting because it uses the equivalent of 1.5 planets per year to provide the resources we use and regenerate our waste. Overshoot occurs when our demands exceed the Earth's supply and capacity for regeneration. In their vision of the future, these individual ecological footprints will be tracked as closely as the stock market, ensuring that buildings, products and cities will have a unique impact. Planet Footprint, and where humans take care to live within the means of renewing our planet. T...... middle of paper ......r redecorate a house every year; I only use energy-saving light bulbs in both countries; I travel by plane pretty much the same way in both places. The only thing that comes to mind is my individual land use for energy production, which was high in the US and almost non-existent in Brazil, which makes sense since Brazil primarily uses energy sources renewables, such as hydroelectric power plants and wind power plants, with these types of clean energy sources accounting for more than 85.4% of the country's energy supply. The United States uses more than 7.0 acres of productive land per capita to meet its needs, which far exceeds its biocapacity of just over 4.0. Brazil uses about 2.5 acres per capita to meet needs well below its biocapacity of 12 acres per capita. In the 1960s Brazil had a biocapacity of 24 acres per capita, so we can see how this is also rapidly declining..