Last week, the EPA reversed course and said it will begin to regulate nanotechnology, specifically nanoparticles of silver used in washing machines. Now comes word that “Berkeley is proposing what a city official says would be the world’s first local regulation of nanomaterials,” according to the SF Chronicle. I love the rationale offered by the city official: “There have been a great number of attempts to regulate them, and they’ve all amounted to nothing because of the fear of upsetting industry, which leaves workers and the community at some unknown risk,” he said. “It’s the unknown that’s a concern to us.” Someone recently explained to me that when pasteurization first became prevalent, many opposed it because of possible unknown health risks. Nanotech is something I plan to keep an eye on and maybe shed some light on the consumer benefits as well as the risks.