New proposed legislation would provide financial incentives for commercial and household green roof installationin the US. Senator Maria Cantwell from Washington State introduced the Clean Energy Stimulus and Investment Assurance Act of 2009 (S.320) January 26th. Section 506 of the bill, which would provide residential and commercial property owners with a 30% tax credit for qualified green roof expenditures, was written in collaboration with Green Roof for Healthy Cities and the American Society of Landscape Architects. The bill would apply to both new and retrofit projects and would require at least 50% of the roof to be covered with a green roof. For more information, click here.