Regulators have approved Wisconsin Electric's experimental ''green'' electric rate for residential and commercial customers, the utility announced. The Energy for Tomorrow programme will allow customers to buy 25-50%, or all their power, from renewable resources, initially hydro and biomass. If customers support the programme, the utility will add Wisconsin-based wind and solar power to the mix. Residential customers now pay about $0.066/kWh, with an average monthly bill of about $37. Customers who choose 100% renewable energy will pay an additional $0.02/kWh, or $11 per month. At 50%, customers will pay an extra cent, or $5.50 per month. At 25%, the amount drops to a half cent, or $2.75 per month. "Having choices is what a competitive market is all about," says the utility's Christopher Schoenherr. "Using renewable resources such as wind, water, sun and plants reduces our nation's reliance on fossil fuels, such as coal and natural gas." Wisconsin Electric is a unit of Wisconsin Energy Corp.