Luxury Hotel Goes 'Green'   Luxury hotels aren't usually on
environmental tours, but the Orchard Garden Hotel in San
Francisco is. On the day that "Nightline" visited the hotel,
Laura Rodormer of the San Francisco Department of the
Environment brought with her a high-level delegation from China
to take a look at the "green" building.  "There really is a big
trend moving towards green due to the cost savings, the improved
health, and it's where buildings are going these days," Rodormer
told ABC's "Nightline."   The Orchard Garden Hotel is one of the
country's first green hotels. The differences are subtle. It was
built out of cement partially made from recycled ash from coal
burning. The lobby is lined with paneling made from recycled
particle board.  In the rooms, guests immediately encounter
energy-saving devices. For example, the room key is inserted
into a slot that activates the lights and the temperature
control. When the guest leaves and removes the key, the lights
turn off. One electrical outlet, howev