On August 28, 2007, the Governor of Illinois signed into law Public Act 095-0481, which set a statewide Renewable Energy Standard and an Energy Efficiency Portfolio Standard (EEPS). Under the RES, utilities in Illinois must supply 2% of their power from renewable energy sources by 2008, 10% by 2015, and 25% by 2025. Seventy-five percent of the electricity used to meet the renewable standard must come from wind power generation; 25% will come from other eligible electricity resources include solar, biomass, and existing hydropower sources. The law also includes an efficiency standard (or EEPS) that requires utilities to implement cost-effective energy efficiency measures to reduce electric usage. The EEPS will require Illinois utilities to reduce overall electric usage by 0.2% of demand in 2008 and escalating to 2.0% by 2015.