WEST LAFAYETTE, Ind. -- As Egyptians carve out more living space by irrigating the desert, Purdue University researchers are helping inventory and preserve plants that otherwise might be lost as the water flows in. Almost 90 percent of Egypt's 62 million people live on just 4 percent of its territory, a narrow swath of land along the Nile River. Population density along the water's edge is 5,000 people per square mile. Beyond them lies desert.
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