The 21st century has been called the “century of the environment.” Governments —and individual citizens — can no longer assume that social challenges such as pollution, dwindling natural resources and climate change can be set aside for future generations. Through policy, research, education, incentives and forward-looking relationships with industry, government can play a central role in building a green future, community by community. The prospects for success have never been greater. A dawning era of creativity and innovation in “green technology” (also known as “clean technology”) is bringing the promise of a healthier planet — as well as the prospect of growing businesses that can sustain its health. The excitement building around this sector is reminiscent of the early years of the information technology revolution.