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

2009
Friday Roundup: Our Favorite Finds This Week
A great compilation of stories worth revisiting, from living walls and shipping container housing to resilient businesses and a day in the life of the Earth video.

2008
Worldchanging a 2008 Webby Honoree!
Then (and now) we thank you for your support!

2005
City Planet
James Cascio highlights Stewart Brand's main talking points from his lecture on our relationship to cities, such as that urbanization is the chief reason why global population growth is flattening and that the footprint of city dwellers is lower than the footprint of country dwellers.

Other recent "look backs":
April 7
April 8