Washington, DC [US], January 14 (ANI): US climate envoy John Kerry is planning to step down from his post by this spring after serving in the position for three years at the helm of US climate diplomacy under the Biden administration, CNN reported citing a source close to Kerry on Saturday. The 80-year-old former secretary of state and Democratic nominee for president led US negotiations at three international climate summits, the most recent of which was held in Dubai. CNN reported the source close to Kerry said he will still attend the World Economic Forum in January and is expected to atten…