Tension is rising between the US and China as the deadline for a climate deal approaches.
Negotiators are pursuing a far more ambitious limit on global warming. But can that really be achieved?
Negotiators just took a big step forward in the fight against global warming.
“I’m just a simple sailor, but it’s hard for me to see the pause on that chart.”
Plus: Tom Steyer on Bernie Sanders’ new climate plan and how global warming will impact the 2016 election.