Humans’ rapid expansion in terms of population and per capita use of Earth’s resources has continued apace. During the past three centuries, the human population has increased ten-fold, to more than six billion, and is expected to reach 10 billion in this century.
随着人口和人均使用地球资源的不断增加，人类正在不断飞速地发展。在过去的300年中，人口数量已经增加了10倍，达到60多亿，预计到本世纪，世界人口将达到100亿。地球30-50%的陆地资源已经被人类所占用。