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					Originally Posted by blankall  Is the city forcing existing owners to build trees on their own lots? Mandating that developers put X amount of trees to would be a pretty easy thing to do. | 
	
 
Lots of places in the world have trees on top of apartment blocks.
Higher density is a way to drive property values in a neighbourhood. You generally get more amenities too. High density around the transport / supply / entertainment hubs and radiating out to lower density. 
The per square metre value of land goes up when you can do more with it.