Mystic River is more muddy than mystic, receiving a "D" grade from the EPA at the Mystic Watershed Summit. [Somerville News] Traffic cameras might soon catch traffic offenders in Somerville, bringing in money and freeing up police to concentrate on other duties. Still, privacy rights proponents are uncomfortable with the idea. [Somerville Blog] The Sox are green with envy environmentalism. Players will wear green recycling logos (pictured) on their jerseys for Earth Day. [Boston Globe]......