Colorado State University atmospheric chemist Delphine Farmer had spent her entire career probing the complexities of outdoor air – how gases and particles in the atmosphere move, interact and change, and how human activities perturb the air we breathe.  Then, she went inside.

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Alaska’s Tongass and Chugach National Forests, which contain some of the world’s largest remaining tracts of intact temperate rainforest, contribute an average of 48 million salmon a year to the state’s commercial fishing industry, a new USDA Forest Service-led study(link is external) has found.

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