Any time an Oak Park resident flips a light switch or powers up a computer, Nebraska windmills send electricity into our power grid. Although Oak Park's pioneering, community-wide, 100% renewable energy contract is ending in spring 2014, the Village Board affirmed its commitment to renewables and is seeking a new contract. The back story: With voter approval in 2011, Oak Park adopted a program to bundle — or aggregate — all residential and small business electric accounts and seek bids for electricity on the open market. Oak Park became the first community in Illinois to require its electricity vendor to supply 100% renewable energy. During the two-year contract, Oak Park residents and businesses saved a whopping $4.9 million on electricity bills. Inspiring fact: Today, 91 other municipalities in Illinois have created similar community aggregation programs to purchase 100% renewable energy. Take that, climate change!