In addition, wind developers generate revenue by selling tradable emissions allowances or credits. Wind energy facilities produce no emissions. The trade helps businesses comply with the Clean Air Act Amendments of 1990 and avoid penalties. Each credit is equivalent to 1 ton of sulfur dioxide for 1 year. Private-sector owners and operators receive the incentive in the form of a federal tax credit.
Some states offer financial incentives for wind development projects, too.
Minnesota provides sales and property tax exemptions for wind energy developers. Wisconsin has created an incentive program that will generate higher profits for investors in utilities that use renewable resources for generating electricity. During the past decade, the wind industry has consistently improved its energy production, financial performance, technological status, and reliability. Because of this industry's steady technological improvement, financial analysts predict a substantial growth in the worldwide market for wind technology. The DOE Office of Energy Efficiency and Renewable Energy reaches out to the states and private industry through a network of regional support offices.