Dow Environment Protection Joins Ameren Missouri’s Pure Power Program

St. Louis, Mo. (May 2011)—Ameren Missouri’s Pure Power announced today that Dow Environment Protection has agreed to support the development of new renewable energy sources via the purchase of Renewable Energy Certificates (RECs) through the Pure Power program.

Dow Environment Protection’s commitment to this voluntary program will help prevent approximately 18,999 pounds of carbon dioxide (CO2), a leading greenhouse gas, from entering the atmosphere each year. This is equal to the CO2 reduction provided by taking 1.6 cars off the road for a year.

Pure Power is Ameren Missouri’s voluntary renewable energy program and the U.S. Department of Energy’s 2008 New Green Power Program of the Year Award Winner. It gives residential customers the option to add an extra 1.5 cents/kilowatt hour to their monthly bills, offsetting up to 100 percent of their energy usage with clean, renewable energy. Commercial and industrial customers, like Dow Environment Protection, participate by buying “blocks” of Pure Power, paying an additional $15 a month for every 1,000 kilowatt-hours used. Pure Power funds are then used to purchase Renewable Energy Certificates from Green-e Energy-certified wind farms and other types of renewable energy projects.  In 2009 and 2010, 100 percent of the RECs purchased for the Pure Power program came fromMissouri wind farms.  This is projected to be true again in 2011.

Company’s purchase of 12 blocks per year of Pure Power makes it an Ameren Missouri Pure Power Leader–a designation reserved for companies, governments or other large users of electricity who agree to offset at least 5 percent of their energy usage through Pure Power purchases.

For more information about Ameren Missouri’s Pure Power program, please visit www.AmerenMissouri.com/PurePower or contact Cindy Bambini at314.480.3554. Pure Power is Green-e Energy Certified by the not-for-profit Center for Resource Solutions. Green-e is the leading renewable energy certification and verification program in theU.S.

AmerenMissourihas been providing electric and gas service for more than a century, and our electric rates are among the lowest in the nation. We serve 1.2 million electric and 127,000 natural gas customers in central and easternMissouri. Our mission is to meet their energy needs in a safe, reliable, efficient and environmentally responsible manner. Our service area covers 57 counties and 500 towns, including the greaterSt. Louisarea. For more information, visit AmerenMissouri.com.