Business Green: As the debate over ethanol heats up with creation of a federal biofuels working group and a new Renewable Fuel Standard, a Texas company has made it easier for businesses, farms and municipalities to produce their own. The systems could benefit companies who want to use alternative fuels in their fleets, potentially save money and simplify their supply chains, but face challenges with the limited availability of the fuel. Dallas-based Allard Research and Development LLC …