Cloudy skies may have kept the crowds down at Saturday's Moving Planet Day  celebration in Civic Center Plaza, but the people that did show up could see light shining through. For being a climate change demonstration, the tone was pretty sunny. After marching from Justin Herman Plaza through downtown, a passel of environmental speakers, from 350.org founder Bill McKibbon to Richmond mayor Gayle McLaughlin, took the stage to talk about ongoing clean energy projects -- and to exhort attendees to keep doing their part to reduce fossil fuel reliance. Click here to check out our interview  from last week with one of the day's organizers. Check back tomorrow, when we'll run photos and talk to organizers from Moving Planet Days around the world.