In January 1998, a six-year-old boy sat cross-legged on the carpet of a first-grade classroom in Kemptville, Ontario, listening to a lesson that most of his classmates would forget by recess.
His teacher, Nancy Prest, was talking about water.
About how children in Canada could walk to a sink, twist a faucet, and drink whenever they wanted. About how children in parts of Africa woke before sunrise and walked for hours just to collect water—water that was often dirty enough to make them sick.
Some children, she explained softly, died because of it.
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