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Christopher Aquilar, Springdale High School sophomore, looks at a sample of healthy stream water Monday as he talks with Rob Seal, naturalist teacher from Ozark Natural Science Center, at the school’s environmental fair at the school in Springdale. The booth explored how certain insect larvae in creeks and rivers can show how healthy the water is. The fair was in honor of Earth Day at the school. The fair featured a number of booths teaching about greener ways of living, earth friendly technology and recycling.