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据美国矿物地质工业局统计,目前每个美国人一年要耗用20吨新采矿物原料。不包括重复使用的金属和建筑材料。专家们预计,如果矿物开采保持目前的水平,那么现在出生的美国人一人一生中将要消耗350公斤锡(用于汽车电池和电子设备等);300公斤锌(用于制造青铜、钢铁构
According to the statistics of the US Bureau of Geology and Mineral Resources, at present, every American consumes 20 tons of new mining material a year. Excluding reusable metal and building materials. Experts predict that Americans now born will consume 350 kilos of tin (for car batteries and electronics) and 300 kilos of zinc (used to make bronze and steel structures