At the COP30 summit in Brazil, more than 80 countries are calling for a global roadmap to phase out fossil fuels. But one country is absent from the annual meeting for the first time: the United States. As the Trump administration pulls back from climate commitments, a new player is stepping into the spotlight. China is the world’s biggest polluter, but also the world’s biggest investor in clean energy. And many are now asking if Beijing could fill the leadership gap left by the US. Chapters: 0: