In one way or another, in the public arena or the private sector, Hertzberg has worked in the water and energy world for the past four decades. He wrote a major paper on water in 1976 and started his first solar company in 1984. During the intervening years, he was an entrepreneur of clean energy technology. Hertzberg’s latest accomplishment is water conservation legislation that establishes a comprehensive framework for both agricultural and urban water conservation and water use efficiency.