David and Helen talk to Jason Bordoff, Dean of the Columbia Climate School and former Special Assistant to Barack Obama, about climate, COP26 and the enormous challenges of the energy transition. How can we balance the need for energy security with the need to wean the world off its dependency on fossil fuels? Why is China still so reliant on coal? Who will pay for the energy needs of the developing world? And just how scared are the oil companies of public opinion?
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