On Monday, May 14, in New York City’s Times Square, Yahoo and Global Green USA, launched the “Be a Better Planet” challenge to find America’s Greenest City.  This nationwide challenge is taking place between May 14 and June 8 – the winning city not only gets all the glory, but they get a fleet of ten hybrid taxi cabs.  Of course, San Francisco should be the natural winner of this competition, but to make this happen, we need you to Act Locally today.