Jasmine grows along the side of the Crash Pad in order to provide insulation and reduce stormwater runoff. Crash Pad is working to become platinum LEED certified through green initiatives, including solar panels and a green roof.

• What: Green roofs and exterior walls, a solar array and a gray water recycling system

• Company: Crash Pad hostel

• Location: 29 Johnson St., behind Niedlov's on Main Street

• How does it work? Crash Pad co-owners Dan Rose and Max Poppel tried to integrate environmentally friendly systems in their building. Their solar panels, which will get plugged into the power grid next week, serve as awnings above their front door. Their roof and walls are covered with vegetation, reducing storm water runoff and helping insulate the building. Gray water, or waste water, from the kitchen is collected and used for the toilets, reducing water consumption.

• Why do it this way? Crash Pad is working to become the third platinum LEED certified building in Chattanooga, a title given to buildings that meet strict environmental guidelines. The building already has a number of green features, for example much of the construction materials came from local recycled material. "We're doing everything in our power to build an energy efficient, cool building," Rose said. "If we have the option to, why not?"

• What's the cost? The solar array, installed by Tennessee Solar Solutions, cost $4,000. The green roofing cost $50,000.