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According to the passage. ……….
Of the world's 2,500-plus species of palm trees, the Palmyra palm is most important to man, next to the coconut palm, because it yields food and provides over one-hundred different useful end-products. To obtain the majority of its benefits, the Palmyra needs to be climbed twice daily to extract the nutritious juice from its flower-bunches. It is this juice, converted in several different methods, that is the basis for a wide variety of other products. Collecting this juice, however, is arduous — and often dangerous — work, for the trees can top 30 metres in height.