The fourth annual Green California Summit and Exposition is coming to the Sacramento Convention Center next week. The expo is one of the biggest green forums with a public-sector focus in the nation. It's also where government and businesses interested in green technology can get educated, according to Racquel Palmese, managing editor of Green Magazine. The expo's theme is "Committed to Sustainability." "In this time of economic hardship, it's important for everyone to keep their eye on the ball, as well as be good for the environment," she said. In addition to an exhibit hall that will feature new developments in green technology, there will be four keynote speakers: 15-year-old Alec L