Guests look at the Eco Smart Fire Burner during the seventh annual Alternative Building Materials and Design Expo at the Santa Monica Civic Auditorium on Friday, May 7, 2010. The expo features over 150 exhibitors. They represent the best of green building and design materials, energy efficiency, alternative energy, water conservation products, environmental plumbing, sustainable landscape, waste management, state agencies, Utilities, Non-profits and Municipalities. Admission is Free to the public.