By José Alberto Gaytán García* Professor William E. Rees, a scientist at the University of British Columbia, Canada, is one of the creators of the Ecological footprint concept, an indicator that measures the impact of hectares in the way we live and consume resources on the planet. This indicator has become a useful tool for scientists, governments, institutions and businesses, allowing warning of the risks entailed of over exploitation of natural resources. Recently, Professor Rees has announced another interesting proposal known as global “green cities”, which is to convert the…
Green cities
