John Kerry, one of the leading architects of the Paris climate agreement, is getting one more chance to lead the fight against climate change after President-elect Joe Biden named the longtime senator and former secretary of state as climate envoy for national security.Biden's team gave little immediate detail on Monday about how he envisioned Kerry shaping the new job, which many on social media and on all sides of the climate-action spectrum were quick to dub “climate czar.” But the transition team made clear that it will be a prominent role, with Kerry becoming the first member of the National Security Council to focus exclusively on climate change.It was one of Biden’s first steps making good on campaign pledges to confront.