SUGAR LAND--January 3, 2012--Researched by Industrial Info Resources (Sugar Land, Texas)--On December 11, 2012, ExxonMobil (NYSE:XOM) (Irving, Texas) held a 2013 Energy Outlook Conference call. William Colton, vice president of corporate strategic planning, began the conference call by emphasizing the importance of energy efficiency. If it were not for energy efficiency, "energy demand would be 500 quadrillion BTUs [British thermal units] higher or about three times of the expected growth to 2040." Colton explained. So clearly, energy efficiency is vital. Throughout the conference call, Colton talked about multiple aspects of the energy industry, including demand and supply. Colton first discussed the world's total demand for energy. He explained that the demand is driven by four sectors: electricity generation , industrial, transportation and residential/commercial.