"Just 40 years from now, some 30% more people will be living on this planet. For business, the good news is that this growth will deliver billions of new consumers who want homes and cars and television sets. The bad news is that shrinking resources and potentially changing climates will limit the ability of all 9 billion of us to attain or maintain the consumptive lifestyle that is commensurate with wealth in today’s affluent markets."

4 February 2010
Alcoa and World business Council for Sustainable Development:
Executive Summary:
http://www.alcoa.com/global/en/pdf/PRINTER_WBCSD_Vision_2050_in_brief_PRINT_tp_Low.pdf