“If we divide the total extent of the planet’s usable surface by the number of people in the world, we obtain the figure of approximately 4.4 acres (1.8 hectares) per human being. An American, however, ‘consumes’ an average of 23.2 acres (9.4 hectares) and a European 11.8 acres (4.8 hectares). If the entire population of the world lived like the USA, we would need six planets. Applying the European model, we would need three planets, even though a large section of the population has a footprint that is lower than 2.4 acres (1 hectare). Humanity’s footprint exceeds the capacity of our planet to regenerate itself and to absorb pollution by about 30%. And this global footprint is increasing each year.”
Arthus-Bertrand, Yann. Home: A Hymn to the Planet and Humanity. New York: Abrams, 2009. Print.