Cousins to the gladiola, these are hardy plants that produce clumps of green sword-shaped leaves, with tall, arching spikes of funnel-shaped blossoms appearing in mid to late summer.
The 10 biggest U.S. electric utilities visualized. Duke Energy's merger with Progress Energy, completed in July 2012, created the largest electric utility in the United States. In fact, two of the three largest U.S. utilities are the result of recent mergers. Exelon, third on the list of the 10 biggest U.S. utilities, merged with Constellation Energy in March 2012. Duke will now service 7 million retail customers across six states.
The Southern Company (SO) is a holding company that owns Alabama Power Company, Georgia Power Company, Gulf Power Company, and Mississippi Power Company, each of which operates as a public utility company. SO is the 16th largest utility company in the world, and the fourth largest in the United States.