Southern Co., the largest generator of electricity in the United States, recently opened a 24,000-square-foot energy commodity trading floor in Atlanta, Georgia. Nearly 100 traders and 400 support people will work at the center, in one of the world`s largest and most sophisticated energy trading centers. The trading floor operates 24-hours-a-day, providing real-time information and quotes. Electronic data walls will show energy demand trends, weather and other financial market information. The facility will serve as a clearinghouse for transactions involving electricity, natural gas, coal and oil, paper and pulp and other refined products.