请大家翻译一段话(中译英)..谢谢啊!

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 a