The main purpose of the Biomass Facility Construction Act is to encourage the development and construction of biomass energy facilities by providing financial incentives. Specifically, it aims to reinstate and enhance investment and production tax credits for both open-loop and closed-loop biomass facilities. This is part of a broader effort to promote renewable energy sources and reduce reliance on fossil fuels. Key provisions of the Act include the introduction of a 30 percent investment tax credit for qualified property used in specified biomass facilities.