A greater incidence of poaching putting those engaged in the protection of wildlife and the natural protection authorities under increasing pressure, and effective protection of pachyderms, which are important in terms of many countries' incomes from tourism, makes increasing demands on resources that are generally scarce; the only long-term protection for ivory is an absolute ban on the trade in it, for it is estimated that some 20 000 elephants a year are killed in Africa for their tusks.
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