Five years ago, China’s longtime leader Xi Jinping shocked and delighted the world by declaring in a video presentation to the United Nations that his country would peak its carbon emissions this decade and achieve carbon neutrality by 2060. He tried to rekindle that magic late last month in another virtual address to the UN, announcing China’s updated pledge under the Paris Agreement. This time, the reaction was far more tepid. Given the disastrous state of American climate policy under ...