1. Understanding the environmental benefits of Green Roofs

2. Urban Island Affect Video Clip: Urban Heat Island Effect – Mitigation http://www.ei.lehigh.edu/learners/luc/heat_island.mov

3. Urban island affect Due to the number of dark colored and paved surfaces prevalent in cities the temperature on a hot day can be 10° Fahrenheit warmer in the city center. Did your data support this claim? Share your Claim- Evidence- Reasoning

4. Green roofs Green roofs can help reduce the Urban Island effect by offering a “lightweight, living system of soil, compost, and plants. It creates a thin, green skin atop a building that gives a little something back to the world.” (ASLA) Why is it important for the Green Roof to be light weight?

5. Environmental benefits of Green Roofs (ASLA)

6. How green roofs are made? Place the layers in the correct order on the worksheet Impervious layerVegetation LayerErosion prevention Growth MediaDrainage LayerRoof Structure

7. The layers of a green roof Top layer: vegetation layer 2nd layer: erosion prevention 3rd layer: soil 4th layer: drainage layer 5th layer: impervious layer 6th layer: roof structure

8. The purpose for each layer Use the bottom half of your worksheet to brainstorm the purpose of each layer. Share your ideas

9. Challenge: CriteriaConstraints You must build a model of a green roof that includes all 6 layers using a shoe box. Your model must reduce the run off of storm water run of by 75% Your model must not exceed 300 grams. Your supplies are limited to household and classroom materials. You will have one class period to build and test your model Your shoe box must have 3 incisions in the bottom that are 10cm long and 1cm wide