The subjects of the study will be use a growing medium plants. or Small bushes including water plant covering the green roof.
A green roof or living roof is a roof of a building that is partially or completely covered with vegetation and a growing medium, planted over a waterproofing membrane. It may also include additional layers such as a root barrier and drainage and irrigation systems
The general limitations of green roof is weight which building obtain for soil and plants by green roofs can be categorized as intensive, semi-intensive, or extensive, depending on the depth of planting medium and the amount of maintenance they need. Extensive green roofs traditionally support 10-25 pounds of vegetation per square foot (50–120 kg/m2) while intensive roofs support 80-150 pounds of vegetation per square foot (390–730 kg/m2) depending on strength of building but my experiment uses water plants in water 3 cm. It has weight fewer than general green roofs. In addition to not necessary use machinery for cropping plants.