RT: San Diego has an ambitious plan to store renewable energy, using extra solar power to pump water up a mountain. This old-style "water battery" technology could be set for a revival. https://n.pr/3MLwLhD
RT：圣地亚哥有一个雄心勃勃的计划来储存可再生能源，利用额外的太阳能将水抽到山上。这种老式的“水电池”技术可能会复兴。 https://n.pr/3MLwLhD