What does Biden’s win mean for the environment and the fight to rein in climate change?

President-Elect Biden ran as a moderate Democrat, but he also campaigned on an aggressive climate platform. How much of that agenda he can pursue could rest on who controls the US Senate, pending results of two runoff elections in Georgia. 

We unpack this with Jody Freeman, law professor at Harvard. Before that she worked for the Obama EPA, where she helped write fuel-efficiency regulations for cars, which were later rolled back under President Trump. 

Biden has pledged to re-join the Paris Climate accord. Though the agreement is non-binding, Freeman says it will be a significant step.