PG&E, the original gas company that illuminated San Francisco's streets in 1854, has transformed into a leader in promoting energy efficiency and renewable energy to combat global warming. PG&E profits from the energy it saves customers rather than the energy it sells. It has exceeded state-mandated targets for reducing emissions and now gets 18% of its power from renewable sources. PG&E supports many energy efficiency programs that have saved over 118 million megawatt hours of electricity, and is investing in technologies like electric vehicles that can provide power back to the grid.