Looking back one, two and five years ago today on Worldchanging:

2009
Worldchanging Interview: Wangari Maathai
Sarah Kuck interviews Dr. Wangari Maathai, a Kenyan scholar, activist and politician who in 2004 became the first woman from Africa, and the first environmentalist, to join the ranks of Nobel Peace Prize laureates. Few people embody the vision that sustainability is about seeing resources holistically -- and understanding that a healthy environment is the foundation for human health and happiness, for international security, and for economic stability -- as passionately as Maathai...

2008
A Thousand Little Pieces: A Graphic Illustration of What We Spend Our Money On
Great graphic, fun tool, and fascinating data on American spending -- but beware, if you don't have a lot of time to waste this afternoon, do not click...

2005
Koyaanisqatsi Revisited
Alex re-watches the movie and is amazed by both the power of the original film making -- it really is a beautiful film -- and the degree to which it feels somehow superfluous now: the imagery, which once felt so fresh, raw, even hallucinogenic, has become the stuff of advertisements, commonplace and unremarked...Which is too bad, because what Godfrey Reggio was after was quite, quite interesting and important...

Other recent "look backs":
May 3
May 4
May 5