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Cell Phones Monitor Water, Soil on African Farms [Q&A]

Cell Phones Monitor Water, Soil on African Farms [Q&A]

As a middle school student in Tallahassee, Florida, Kelly Caylor built a weather balloon for the science fair. Decades later, he's distributing high-tech environmental sensors, or "pods," throughout sub-Saharan Africa.

April 10, 2015 — Kerry Klein

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