Optimization of Energy in Sustainable Architecture and Green Roofs in Construction: A Review of Challenges and Advantages

Table 6

The comparison between intensive and extensive systems.

Features	Intensive	Extensive	Source
Diversity	High	Low	[28, 43]
Maintenance	Complex	Easy	[28, 43, 44]
Cost	High	Low	[13, 28, 43, 45]
The thickness of growing media	>200 mm	<200 mm	[19, 28, 40, 43]
Construction	Complex	Easy	[28, 43]
Weight	>300 kg/m^2	50–150 kg/m^2	[28, 34, 43]