China is the world's largest carbon emitter, after the U.S., producing an estimated 27% of global greenhouse gases. Kerry is in the country for talks on stronger efforts to curb rising temperatures.
John Kerry, the former secretary of state and now President Biden's special envoy for climate, is the highest-ranking U.S. official to visit Moscow since Biden took office.
One challenge facing John Kerry in his new role as climate envoy to President-elect Joe Biden will be to convince other governments the U.S. will abide by its commitments.