John Kerry Stepping Down as Biden's Climate Envoy After Tireless Efforts
• John Kerry, U.S. special envoy on climate, is stepping down from the Biden administration in the coming weeks
• Kerry was tapped for the role in 2020 to fight climate change on the global stage given his experience as Secretary of State and Senator
• He helped draft the 2015 Paris climate agreement and kept a busy schedule advocating for climate action across the world
• Kerry has been praised for his "heroic" and tireless work but also criticized for U.S. climate policies seen as protectionist
• He represented Massachusetts in the Senate for 28 years and was the 2004 Democratic presidential nominee