Knowledge hub Films Sand Dams Worldwide sustainable farming: educational film - Part 2 Published in November 2009 Part 2 of Sand Dams Worldwide's (formerly Excellent Development) sustainable farming educational film demonstrates the importance of sustainable agriculture for food security and poverty alleviation. Like with Part 1, the film ends with a short quiz for those wanting to test their new knowledge of sand dams and their impact. Watch Part 1 again here. Manage Cookie Preferences