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"Visitors to Arizona's Organ Pipe Cactus National Monument see proof of nature's resourcefulness, from the kangaroo rat, which drinks no water yet thrives in the arid climate, to the creosote bush, which makes its own natural herbicide."^^<http://www.w3.org/2001/XMLSchema#string>
<http://adventure.howstuffworks.com/organ-pipe-cactus-national-monument.htm>