Seattle Green Factor -- Seattle, WASeattle Green Factor (SGF) is an innovative development standard designed to increase the quantity and quality of urban landscaping. Informed by European precedents, planners developed a scoring system to promote attractive and ecologically functional landscapes, including elements such as green roofs and walls, permeable paving, tree preservation, and food cultivation. Adopted by City of Seattle in 2006 and expanded in 2009, SGF is inspiring municipalities across the country to develop similar