vertical zoning

例句：

1. 1.The city has implemented vertical zoning to improve air quality.
   该城市实施了垂直分区以改善空气质量。
2. 2. The new development zones are designed to promote sustainable growth.
   新的开发区域旨在促进可持续增长。
3. 3. The government is considering revising the vertical zoning regulations to address concerns about overcrowding.
   政府正在考虑修订垂直分区规定，以解决过度拥挤的问题。