This presentation discusses ways for libraries to become more environmentally sustainable. It begins by defining sustainability and the "three Es" of environment, social equity and economics. Buildings consume large amounts of resources, contributing significantly to environmental problems. The presenter outlines 10 opportunities for libraries to reduce their environmental impact, such as implementing a green policy, improving the building envelope, using more efficient lighting and computers, conserving water, and incorporating renewable energy. Case studies of libraries that have implemented sustainable practices are provided. Funding sources for green building projects are also mentioned. The presentation encourages libraries to educate patrons about sustainability through programming and other means.