Salem: Katie Giddings of Salem recently completed a course certifying her to identiry potential problems at Salem Harbor Power Station by visually assessing the thickness and concentration of the smoke rising from the power station's stacks. If the smoke appears too think, Giddings can contact local environmental agencies, who can then investigate the plant. Giddings has always been interested in environmental issues, and says the certification gives her a chance to act against global warming. Photo by Matthew Viglianti/Staff Photographer Tuesday, June 16, 2009.

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