May 1, 2011
Powershift: Bill McKibben and Tim DeChristopher
Earlier this month, over 10,000 climate activists convereged on Washington D.C. for Powershift 2011, national youth climate summit.
Bill McKibben and Tim DeChristopher were both on hand with powerful speeches.
You can catch both McKibben and DeChristopher as special guests at this year's festival.
