SAN FRANCISCO Officials in San Francisco are stepping into something new -- recycling doggie doo to generate power. Norcal Waste, a garbage hauling company, will collect droppings from a popular dog park. The dog doo will be used to produce methane gas, which can power electric generators. The technology is already used on chicken, hog and dairy farms. San Francisco has plenty raw material for poo power. Residents of The City own an estimated 240-thousand dogs and cats. City officials say Rover, Tabby and their pals produce about 65-hundred tons of doo a year.