Yet we must complete most of the transformation to low-carbon energy by mid-century. This is extraordinarily difficult given the long transition period needed to overhaul the world’s energy infrastructure, including not only power plants, transmission lines, and transport systems, but also homes and commercial buildings.
时间是最大的拦路虎。如果我们有一个世纪来改革世界能源系统，我们或许有理由感到安全。但我们必须在本世纪中叶完成向低碳能源转型的绝大部分任务。鉴于检修电厂、输电线、运输系统等世界能源基础设施及住宅和商业建筑需要较长的过渡期，因此完成这项任务确实困难重重。