Austin-American Statesman: Dell Inc. said Wednesday that it is running its Round Rock headquarters complex entirely with "green power" coming from renewable energy. The computer maker said it struck an agreement with its electric utility, TXU Energy, to use electrical power generated from wind power and landfill methane to supply 80 million kilowatt hours a year to the 300-acre campus with 2.1 million square feet. More than 10,000 Dell employees work on the campus. The world’s …