Sustainable landscaping practices take root in Tenn. city

Sustainable landscaping practices are gaining ground in Knoxville, Tenn., due to growing customer demand and green certification programs. Some companies use propane to fuel their equipment to reduce emissions. They might also promote organic ways to fertilize the yard and encourage green roofs to reduce runoff. "I think we all recognize that as stewards of the environment, resources are finite," said Sara Hedstrom Pinnell, founder and principal of Hedstrom Design, a landscape architecture firm.

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