题目内容：

The Chinese once used 3,000,000,000 plastic shopping bags a day.And they have caused pollution of e

优质解答

应该是：The Chinese once used 3,000,000,000 plastic shopping bags a day.And they have caused pollution of (enviroment )
中文意思：中国人一天要用掉30亿个塑料购物袋.这堆环境已经造成了污染.