Green infrastructure practices use natural processes to filter pollutants from stormwater runoff and promote groundwater recharge. Learn about the benefits of green infrastructure and tour the library’s green practices. Reservations are required. Sponsored by Hudson River Estuary Program and Water Resource Institute of New York at Cornell University, with Cornell Cooperative Extension of Columbia and Greene Counties, Columbia County Soil and Water Conservation District, Lower Hudson Coalition of Conservation Districts, and Columbia Land Conservancy. To register, contact Ellen Jouret-Epstein at 518.392.5252, ext. 208 or ellen@clctrust.org.