... beyond the open farmlands—they were the chlorophyll green of Terran vegetation—and the natives at work in the fields were being watched by more military and police vehicles. The carniculture plants, where Terran-type animal tissue was grown in nutrient-vats, were even more heavily guarded, and the native city was being patroled from above and the streets were empty, even of the hordes of native children who ... — Oomphel in the Sky • Henry Beam Piper
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