奇招

2019年转瞬到了尾声，各大词典年度词汇榜单陆续出炉，climate emergency(气候紧急状态)，climate strike(气候罢工)，upcycling(升级回收)等词汇上榜。气候无疑成为2019年最受关注的话题之一。A protester makes a point at a Greenpeace

美抗旱奇招：水库投遮阳球Los Angeles protects open-air reservoirs with millions of floating 'shade balls'The city has completed a program of covering open-air reservoirs with floating shade balls to protect water quality.