Looking back one and five years ago today on Worldchanging:

2009
The Lessons of Katrina: Global Warming Adaptation is a Cruel Euphemism and Prevention is Far, Far Cheaper
Joe Romm adds an update to his writing about climate adaptation and argues that there's still time for prevention, which is the better way to go...

2005
Patrick di Justo: Climate Consensus
Patrick di Justo, a New York-based science journalist, reports on the current state of understanding of the interactions between climate and ecosystems, and the efficacy of climate models...

Other recent "look backs":
August 26
August 27
August 30