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The large percentage of students who report that they would choose to obtain condoms at school suggests that condom availability policies at school would increase sexually active students ' access to and use of condoms , particularly in the lower grades . The requirement that the highland site be relatively immature is an important one , but one which can fairly easily be met by location near a relatively large fresh crater that has ejected a large quantity of fresh , immature soil . A large number of the SSTs have emerged only recently from colonialism ( or are still under foreign sovereign authority ) . Certainly these figures show the small amount of accumulated capital among the Negroes , and the conse - quent large dependence of their property on temporary pros - perity . Would-be dam builders as well as governments contemplating dam removal such as the United States should seek alternatives to large dams and consult environmental experts , people who would be affected by the dam and other interested parties before deciding what to do with them , the World Commission on Dams said .