books.google.it - Our Ecological Footprint presents an internationally-acclaimed tool for measuring and visualizing the resources required to sustain our households, communities, regions and nations, converting the seemingly complex concepts of carrying capacity, resource-use, waste-disposal and the like into a graphic...http://books.google.it/books/about/Our_ecological_footprint.html?hl=it&id=N__ujKDfXq8C&utm_source=gb-gplus-shareOur ecological footprint
