design for sustainability is a joint publication by the UNEP and Delft University of Technology onDesign for Sustainability: a practical approach for developing economies. The site is basically a set of .pdf documents explaining the concepts and how to do it! you can find an introduction to the publication and the concepts on the website or here (.pdf, 260kb). to be able to implement sustainable ideas in our daily life we need that people who plan and design the products and services we use to have an understanding of the concept of sustainability but also the tools to be able to implement that understanding, d4s is a good step in the right direction.

http://socarc.wordpress.com/2007/08/08/designforsustainabilityd4s/

http://www.core77.com/