As the United States steps back from its climate commitments, China is quietly contemplating whether to host the 2028 UN climate summit — a move that would place the world's largest greenhouse gas emitter at the center of the world's most consequential environmental conversation. No formal bid has been made, but the deliberation itself reveals Beijing's deeper ambition: to claim moral authority on a global stage where American leadership has gone dark. The timing, falling near the 2028 US presidential election, adds a layer of geopolitical calculation to what might otherwise appear a simple ac