translation.en: Washington, D.C., last year, actually led the nation in new green roofs installed, and they're funding this in part thanks to a five-cent tax on plastic bags.
translation.zh: 华盛顿在去年实际上带领了这个国家 建立绿色屋顶，而他们也通过 5分钱的塑料袋税收来为这项工程提供资金。