Pearl Jam, Dave Matthews Band, Phish, Jack Johnson and many more artists featured in past years' Bonnaroo festivals are donating their music to encourage Americans to speak out on climate change. All of the featured tracks are original songs, with the exception of My Morning Jacket's performance of The Velvet Underground's "Oh! Sweet Nuthin'".

Organized by the Bonnaroo Music & Arts Festival, HeadCount and the NRDC Action Fund, this collaboration marks the first time free music has been used to prompt Americans to contact their elected officials. 

Best of Bonnaroo isn't your run of the mill compilation, pulling the hits from each artist in a patchwork attempt to appeal to the masses. The 17 different live performances were hand-picked and represent powerful works from each artist. Ani DiFranco's "Fuel" is a gripping, immensely gravitational re-telling of a fan favorite, while Pearl Jam's "Animal" is more celebratory than furious, a buoyant romp through formerly dangerous grounds. The Decemberists' "The Wanting Comes In Waves/Repaid" is perhaps the most powerful track off their most recent Hazards of Love album, taken to new heights here, while Death Cab For Cutie turn in a shimmering rendition of "Cath..." and the crowd singalong on O.A.R.'s "Delicate Few" is nothing short of amazing.

"This generation has an opportunity to be remembered as one that confronted environmental challenges and took responsibility for the future," said Jack Johnson, whose song "Inaudible Melodies" can be heard on the compilation. "With that opportunity comes the responsibility to speak out."

With climate change legislation now at a critical juncture, several organizations teamed up to use the gift of music to inspire citizens into action. HeadCount - a nonpartisan civic engagement organization best known for registering voters at concerts  -  conceived the idea as a way to point new voters toward being informed and active citizens. The NRDC Action Fund - an advocacy group committed to passing legislation that jump-starts the clean energy economy and reduces pollution - stepped in with resources, research, strategic guidance and a base of 250,000 supporters. 

"The musicians we work with are very passionate about this topic and have great power to drive change," said HeadCount's Executive Director Andy Bernstein. "Their music will serve as a soundtrack for action."

"Forging a clean energy future means healthier kids, a safer world, and more jobs," said Heather Taylor-Miesle, director of the NRDC Action Fund. "This is our moment to demand that Congress put us on the path to a clean energy future by beginning to address climate change. We are excited about the opportunity to work with musicians and new activists throughout the country to make it happen."

To download the album for free or just a few select tracks from the festival, head to www.Musicforaction.org. Before downloading the music, visitors are asked to email their Senators, the President or their local newspapers about climate change. The music is free no matter what, but the artists hope all their fans join them in taking action on this issue. 

"There have been so many incredible performances at Bonnaroo over the years," said Richard Goodstone, one of the founders and principals of Superfly Presents, the co-promoter of Bonnaroo. "We're very happy that we could work with our family of artists in this way and inspire people to be active citizens. Climate change is the single biggest challenge our planet has ever faced and we all need to pitch in and be part of the solution."

"The decisions made today will affect you and your children for many years to come," said former Grateful Dead guitarist Bob Weir, a member of HeadCount's board of directors who can be heard on the compilation with has band RatDog. "Whether it's voting in an election or speaking out about issues like climate change, it's critical that we all make enough noise so that politicians have no choice but to listen."

The Best of Bonnaroo track list is below:

Wilco - Bull Black Nova

Pearl Jam - Animal

Jack Johnson - Inaudible Melodies

Dave Mathews Band - Rapunzel

Death Cab for Cutie - Cath...

Ani DiFranco - Fuel

Phish - Kill Devil Falls

Gov't Mule - Banks of the Deep End            

O.A.R. - Delicate Few

moe.- Not Coming Down

Raphael Saadiq - 100 Yard Dash

Bob Weir & RatDog - Throwing Stones

The Disco Biscuits - And The Ladies Were the Rest of the Night

The Decemberists - The Wanting Comes in Waves/Repaid

My Morning Jacket - Oh! Sweet Nuthin'

Guster - Happier

Phil Lesh and Friends - Box of Rain

Tickets for Bonnaroo 2010 are on sale now.