China and the United States have announced a deal, to unify their leadership for the good of the planet. At COP26, envoys Xie Zhenhua and John Kerry — who worked together toward the Paris Agreement in 2015 — say they will create the frameworks and standards to breathe new life into global action. This is an expression of what the world's two largest economies can achieve for humanity — not only for the planet, but in addressing today's major challenges.