The move will save Starbucks some $50 million in utility costs over the next decade, building on its current 10-year legacy of utility cost savings generated from its green practices already in place. Those steps save it some $30 million annually in operating costs, the company said. Starbucks' plans are being developed in concert with experts from the World Wildlife Fund, and will be audited and verified by SCS Global Services, which oversees Starbucks' Coffee and Farmer Equity Practices. The materials will also be shared so other retailers can follow suit, Starbucks said.