HANOVER, New Hampshire, April 3 -- Dartmouth College issued the following news: * * * Ecology PhD Student Sees Possibility in Polluted Places Emily Sigman researches how to make maple syrup from trees in contaminated sites. On a raw late-winter afternoon in March, 10 Dartmouth students participating in an immersion program sponsored by the Sustainability Office trudged up a steep hill and into the woods, navigating an icy, rocky trail and a thin layer of fresh snow. Members of the Sugar Cr more PR