Bill McKibben explained the Do the Math tour, the new evolution of climate activism, the fossil fuel divestment movement, the good news 

350.org environmental activist Bill McKibben talks Tim DeChristopher, Key Stone XL pipeline and calls out Fossil Fuel industry for taking massive

Bill McKibben, author and founder of 350.org, speaks to Sam Seder about the conviction of nonviolent climate activist Timothy DeChristopher and  predicts we’ll see more of this type of confrontational activism and discusses the need for a change in tactics of the environmental movement.