Hillary Clinton’s former campaign chief John Podesta has been tapped to become the US government’s new climate envoy. The White House announced on Wednesday that Podesta will take over the post of special envoy for climate from former senator and secretary of state John Kerry, who has been engaged in global climate policy for decades. Podesta currently serves as US President Joe Biden’s adviser on clean energy innovation and implementation. The 75-year-old will take on the international role in climate protection in addition to his current job, the White House said. “John [Podesta] is a key ar…