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It’s 8 o'clock on a rainy, windy Saturday morning, and John Hoac and Brandon Teeny just got to school —  Cleveland High in south Seattle. They’re here to measure air and noise pollution on campus.

“In south Seattle it’s much noisier” than in north Seattle, says Troy Abel, a professor of environmental policy at Western Washington University. He’s leading the two-week pollution study and providing the pollution monitors that Hoac and Teeny hang around their necks in preparation for their walk around campus. “These personal, handheld pollution monitors are … a way to help capture that human experience.”