请大家翻译一段话(中译英)..谢谢啊!

城市绿地对环境和人都有重要意义
The city green space all has the vital significance to the environment and the human.

然而在人口爆满、建筑群密集、土地有限的城市
However in population very full, architectural complex crowded, land limited city.

大片的绿地是不太现实的
Big piece green space not too realistic.

因此增加城市绿化面积必须向屋顶绿化、垂直绿化的立体化方向发展
Therefore increases the city afforestation area to have to afforest, the vertical greening three-dimensional direction to the roof develops.

屋顶绿化和垂直绿化各有特点，在节省土地面积的同时增加了城市绿化面积。
The roof afforestation and the vertical greening have the characteristic respectively, while saved the land area to increase the city afforestation area.

The city green space all has the vital significance to the environment and the human, however in population very full, architectural complex crowded, land limited city, big piece green space not too realistic, therefore increases the city afforestation area to have to afforest, the vertical greening three-dimensional direction to the roof develops. The roof afforestation and the vertical greening have the characteristic respectively, while saved the land area to increase the city afforestation area.

The city green space all has the vital significance to the environment and the human, however in population very full, architectural complex crowded, land limited city, big piece green space not too realistic, therefore increases the city afforestation area to have to afforest, the vertical greening three-dimensional direction to the roof develops. The roof afforestation and the vertical greening have the characteristic respectively, while saved the land area to increase the city afforestation area