| http://www.w3.org/ns/prov#value | - Others, such as Chicago, have virtually eliminated chemicals from their park systems.Metz calculates that the organic approach costs Durango $0.009 per square foot versus $0.007 for the traditional approach, and acknowledges the city will need more volunteer help to maintain the program.Chicago actually has saved money by eliminating chemical usage across 90 percent of its 6,000 acres of turf, sai
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