Southern California has been at the forefront of design and architectural innovation for generations, and with the increased interest in all things eco-friendly, local built-culture visionaries are poised to keep the momentum going. The fifth year of the CA Boom design fair threatens to be the biggest one yet. More than 120 vendors, lectures, workshops, and tours hint at homegrown design's global future in areas from alternative building materials to simple ways of greening up your life without sacrificing comfort and style.