为什么极端天气从“百年一遇”变成“一年几遇”？

ABC: The IPCC issued its bleakest report yet this week, saying that without drastic changes, the world doesn't have a hope of avoiding uncontrollable climate change. Unless emissions are halved within 12 years and virtually eliminated by 2050, temperature increases will likely exceed 2 degrees Celsius. Beyond 2 degrees, scientists predict temperature increases may spiral as the climate breaches a series of unique tipping points, such as the melting of the permafrost. 主播：周邦琴Albert ●没有名牌大学背景，没有英语专业背景 ●没有国外留学经历，没有英语生活环境 ●22岁成为500强公司英文讲师，录音素材全球员工使用 ●自学成为同声传译，25岁为瑞士总统翻译