Objective EN.2 Restore, preserve and protect healthy natural habitats

2. UC Davis. "Green Roofs: A Sustainable Technology Sustainability and the Built Environment UC Davis Extension" http://extension.ucdavis.edu/unit/green_building_and_sustainability/pdf/resources/green_roof.pdf
4. Stormwater Manager's Resource Center: Stormwater Management Fact Sheet: Infiltration Trench. http://www.stormwatercenter.net/Assorted%20Fact%20Sheets/Tool6_Stormwater_Practices/Infiltration%20Practice/Infiltration%20Trench.htm
5. University of Connecticut. Nonpoint Education for Municipal Officials, Planning for Stormwater: Permeable Pavements http://nemo.uconn.edu/tools/stormwater/pavements.htm
6. US EPA Region 9: Guidelines for Water Reuse. http://www.epa.gov/ord/NRMRL/pubs/625r04108/625r04108.pdf
7. City of San Diego Water Department: Recycled Water: http://www.sandiego.gov/water/recycled/
9. Victoria Transport Policy Institute: Pedestrian and Bicycle Planning A Guide to Best Practices. http://www.vtpi.org/nmtguide.doc
10. San Francisco Planning Department: Recreation and Open Space. http://www.sfgov.org/site/planning_index.asp?id=24887#ros.cty.2.2
12. San Francisco Planning Department: Recreation and Open Space. http://openspace.sfplanning.org/