By Joshua Liberles
Completing the circle: Gas at the pump, war in Iraq, and global warming

The war in Iraq, originally known as O.I.L. (Operation Iraqi Liberation, that is) recently passed its fifth anniversary. Oil Change International recently published a study that quantifies the greenhouse gas emissions from the Iraq War as well as some of the environmental opportunity costs.
Bicing takes Barcelona by storm

In its first two months, Bicing, a bike-sharing program in Barcelona, Spain, garnered over 30,000 subscribers. The program’s popularity has only grown, which is good news for new bike-sharing programs in Washington D.C. and San Francisco.
All aboard for National Train Day

May 10th marks the first edition of National Train Day, a celebration of trains, tracks, mass transit, and efficient travel. The date is significant as the anniversary of the joining of the Central Pacific and Union Pacific railways in Utah 1869 -- which created the U.S.' first transcontinental railroad.
Valley Girl decries car culture

The Los Angeles' Times "Emerald City" blog recently ran a great post illustrating how Southern California turned from sunny citrus paradise to car-choked hell. Cassandra Davis mixes an historical account of the evolution of car culture in SoCal with her own firsthand experiences growing up as a Valley Girl.
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A strong economy would help the clean tech revolution get a foothold. And a weak economy will hurt it.
Hummers do not beat Priuses in eco-friendliness over their lifetime, and other urban legends debunked.
If all the roofs in the world were white, according to a new study, the effects of global warming would be significantly reduced.
Old pantyhose can become everything from a bungee cord to a scrubber to a paint filter.
Next time you're weighing your options, consult GoodGuide, a source for free, scientist-verified data on more than 60,000 products.
Use this interactive map to find people giving away free stuff, or who will take yours off your hands.