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(Scott Sommerdorf | The Salt Lake Tribune) Miguel Lagunas sees how a pollution detector works that was made from Legos ... (Scott Sommerdorf | The Salt Lake Tribune) Emma Rieves of Utah Clean Energy speaks at the Breathe Clean Festival - an e... (Scott Sommerdorf | The Salt Lake Tribune) Results from studies showing how pollution levels in Salt Lake City can be d... (Scott Sommerdorf | The Salt Lake Tribune) Representative Sandra Hollins, D-Salt Lake, speaks at the Breathe Clean Fest...