Brought down to earth, nuclear fusion – a process fueled primarily by lithium and deuterium (an isotope of hydrogen), both of which are plentiful in seawater and in the earth’s crust – could provide a major source of low-carbon energy. A fusion power station would use only around 450 kilograms of fuel annually, cause no atmospheric pollution, and carry no risk of accidents that could lead to radioactive contamination of the environment.
地球核聚变的主要能源来自锂和氘（氢的同位素），这两种主要集中在海水和地壳中的元素是低碳能源的源头。核聚变电站每年只需要约450千克燃料，既不会造成大气污染，也不会发生导致环境放射性污染的事故。