McKinsey Global Energy and Materials, Unlocking Energy Efficiency in the U.S. Economy, http://www.mckinsey.com/client service/electricpowernaturalgas/ downloads/US_energy_ efficiency_full_report.pdf http://www.epa.gov/WaterSense/pubs/fixleak.html http://www.epa.gov/WaterSense/pubs/fixleak.html http://www.epa.gov/WaterSense/pubs/fixleak.html http://www.mckinsey.com/client service/electricpowernaturalgas/ downloads/US_energy_ efficiency_full_report.pdf http://www.mckinsey.com/client service/electricpowernaturalgas/ downloads/US_energy_ efficiency_full_report.pdf http://www.mckinsey.com/client service/electricpowernaturalgas/ downloads/US_energy_ efficiency_full_report.pdf http://www.mckinsey.com/client service/electricpowernaturalgas/ downloads/US_energy_ efficiency_full_report.pdf 66 / hP 2010 GLoBAL CitizenShiP RePoRt / enViRonment / SUStAinABLe deSiGn / Life CYCLe ASSeSSment can be identified.