Through a shadowy group called the American Legislative Exchange Council, the billionaire Koch brothers have helped advance a number of state laws that benefit corporate and right-wing interests. An internal document shows ALEC is tracking 131 bills which, among other issues, seek to roll back renewable energy standards, combat federal coal regulations and tout the Keystone XL tar sands oil pipeline. ALEC's efforts recently paid off in Oklahoma where Gov. Mary Fallin has signed a measure allowing utilities to charge customers who generate energy from solar panels or small wind turbines.