The architects of 2012 Architecten in Rotterdam, The Netherlands, use discarded materials for their design purposes. But in order to work with waste, one needs certain tools. One of these is the "harvest map," a guide to regional dump sites and the materials they contain. Another tool is the Superuse Web site, where architects and the general public share designs that incorporate waste materials.

London: The Price of Traffic

e2 is an ongoing PBS documentary series that chronicles efforts to solve the world's most pressing ecological challenges. From energy consumption to design efficiency, policy to industry, the series documents the innovators whose work is reducing humans' impact on the environment. Interviews with experts, policymakers and pioneers across a variety of disciplines offer a firsthand account of the complex environmental challenges that we face, as well as the possibility that pragmatic solutions are within reach. The series is narrated by Brad Pitt and Morgan Freeman. Each episode is supplemented by a video podcast that features new footage and unseen interview excerpts, providing further insight into the social and environmental issues that series examines. Produced by kontentreal, new episodes of e2 release on PBS member stations every Tuesday beginning September 2, 2008. Check your local listings. Major corporate support for e2 is provided by Autodesk.