China, the world’s biggest source of carbon dioxide, is aiming for carbon-neutrality by 2060. President Xi Jinping announced this goal while speaking to the UN General Assembly by video. Xi took the assembly by surprise. Since world events and political tensions have stalled global climate negotiations, the general assembly had expected little progress on climate change until 2021. “We aim to have CO2 emissions peak before 2030 and achieve carbon neutrality before 2060,” Xi said, according to the official translation.