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Compost Facility Operator Donna Tisher shows Green Park Summer Academy Students how temperatures within the landfill's compost piles can reach up to 160 degrees. At 130 degrees, harmful fecal matter is destroyed. July 20, 2011

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Kids dig into summer school

Green Park's program gets students into hand-on situations, such as a visit to compost facilities.

WALLA WALLA -- Weaving between rows of warm, dark earth, a group of Green Park Elementary students were on a mission.

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