Furthermore, MIT has developed the foldable electric CityCar, four of which can fit into a conventional parking space. At last year’s Rio+20 conference, the eight largest multilateral development banks pledged $175 billion to develop sustainable transportation.
此外，麻省理工学院研发出折叠电动车CityCar，4辆电动车仅仅占据一个传统的停车位。在去年召开的里约+20峰会上，8家最大的多边开发银行承诺投入1750亿美元用于可持续交通建设。