The IEA projects global primary energy demand could grow by 55% from 2005 to 2030, raising serious energy security and environmental sustainability concerns. How will we meet energy demand? How will we mitigate the resulting 57% increase in carbon dioxide emissions? Rapidly implementing energy efficiency measures is the crucial first step towards addressing these challenges at low or negative costs. Many countries have made significant gains in energy efficiency, but more needs to be done. To advance global energy efficiency efforts, the IEA developed a set of 25 policy recommendations that, if implemented, could reduce global CO2 emissions by 20% per year by 2030. The recommendations aim to: save large quantities of energy at low cost; address existing market imperfections or barriers; address significant gaps in existing policy; and encourage widespread implementation.