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

2009
Rising Voices’ Projects Propel Citizen Media
This piece is a part of "Resources from the Worldchanging Library." Rising Voices, led by David Sasaki, is an initiative that demonstrates that citizen media is possible in any corner of the globe...

2008
Can Sustainability Save the Midwest?
Sarah Kuck examines the state of sustainable agriculture in the Midwest U.S. and shares her vision for a bright green future...

2005
Urban Density, Left-Coast Style
Jamais Cascio explores the density number of Los Angeles and San Francisco; they're not as straightforward as you might think!

Other recent "look backs":
August 9
August 10
August 11