urban greening

例句：

1. 1. Urban greening is essential for reducing air pollution and improving the quality of life in cities.
   城市绿化对于减少空气污染和改善城市生活质量至关重要。
2. 2. The city government has launched a campaign to encourage more people to participate in urban greening projects.
   市政府发起了一项活动，鼓励更多人参与城市绿化项目。
3. 3. The park was transformed into a vibrant urban greening space with new trees and plants.
   公园被改造成了一个生机勃勃的城市绿化空间，新增了树木和植物。