Measuring our ecological footprint
How much of the earth does each of us use? Of the 51 billion hectares of the earth’s surface, only 12 billion of it are “biologically productive”, meaning that less than a quarter at 23% of the earth’s surface provides resources and treats waste for over six billion people. Each living person has less than two hectares to use in his lifetime. This calculation does not consider the needs of plants and animals that number at least another 10 million. Nor does it consider future generations.