Knowledge hub Films Sand Dams Worldwide sustainable development: educational film - Part 1 Published in October 2009 This 3 part film explains sustainable development, using the work of Sand Dams Worldwide (formerly Excellent Development) as an example of how community-led approaches can create conservation and a virtuous cycle of development. There are questions at the end for anyone that wants to test their knowledge. Watch Part 2 here. Water Part 3 here. Manage Cookie Preferences