surface trash

例句：

1. 1.The city's surface trash is a major environmental issue.
   城市的表面垃圾是一个重要的环境问题。
2. 2.The government has launched a campaign to reduce surface trash in the city.
   政府已经发起了一场运动，以减少城市中的表面垃圾。
3. 3.The surface trash in the park was collected and disposed of properly.
   公园里的表面垃圾被收集并适当处理了。