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

2009
Letter from Sweden: The State of the End of the World
Alan Atkisson reports from the 100th session in a series of Stockholm Seminars featuring a star cast of scientific minds. The topic was climate, ecosystems, and development, and the many ways in which their fates are inseparable...

2008
Are Myanmar’s Storm Victims Suffering Needlessly?
As the floodwaters of Cyclone Nargis began to recede from Myanmar's low-lying Irrawaddy Delta this week, at least one regional leader was quick to note that this devastating disaster could have been partially prevented through better coastal management...

2005
Two to Tango
James Cascio looks at the Tango, a two-seat tandem electric vehicle moving from test car to production. It's small enough that it can perpendicular park in a parallel parking space, roomy enough for a driver over 6', and can go from 0 to 60 in four seconds...

Other recent "look backs":
May 5
May 7
May 10