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

2009
Free Parking Isn't Free
Seth Zeren discusses the vast impact parking spaces have on the economy, land use patterns, city planning, lifestyles, and sustainability...a must read!

2008
Could Globalization Be Going In Reverse?
Alex Steffen explores how for the first time in recent decades, it seems there are now real reasons to question the logic underlying the official future of ever-increasing global trade...

2005
The Papalotzin Panopticon
Emily Gertz looks at recent research on butterflies, and at butterfly farming...

Other recent "look backs":
July 30
August 2
August 3