Thanks to companies like NativeEnergy, the carbon-neutral movement - buying so-called green tags to offset CO2 emissions - is well into its hipster moment. Shows by Ben Harper, Radiohead and Death Cab for Cutie at Berkley's green Greek theater this summer will be carbon neutral, courtesy of NativeEnergy and Clif Bar. The Dave Matthews Band recently bought renewable credits from NativeEnergy for all of its 15 years of (almost nonstop) touring. Even we mere mortals can opt in through such low-dollar programs like the company's CoolDriver and WindBuilders.

Environmentally conscious beauty company Aveda has partnered with eco-fashion leader Project Alabama to unify Kirstin Dunst, Jessica Alba, Avril Lavigne, Susan Sarandon, Le Ann Rimes, Carmen Electra, Naomi Watts, and many, many others. The last time this much talent worked on one project was a surprise birthday party for Kevin Bacon, but how could any of them have said no to a fun project that raises money for the NRDC? Handbags for the Earth has the celebs autographing and decorating bags that are available for purchase on Ebay. The auction ends a week from today, so place your bid ASAP.

Riding a bicycle is usually a great way to reduce fossil fuel emissions. But that's not necessarily true if you're a cyclist on a racing team, driving around the country to compete. That's why Clif Bar is trying to offset the fossil fuel use of its cycling team by buying wind farm credits – and offering the public a chance to buy them too.