MADISON, Wis. -- Wisconsin Power and Light Co. is offering a plan to reduce its greenhouse-gas emissions if state regulators agree to its proposal to build a new coal-fired plant in southwestern Wisconsin.

The utility is a subsidiary of Madison-based Alliant Energy Corp. It said on Thursday it would cut emissions by adding wind power and by retiring an old coal boiler at its plant in Sheboygan.

Wisconsin Power officials also said that they will increase the amount of organic waste that would be burned at its proposed plant in Cassville.

The company said its offer means any carbon emissions from the new plant would be more than offset by these conservation measures.

Details of the plan are expected to be filed with state regulators Friday.