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谈人口问题,总是离不开我们所生活的这个地球。那是因为地球上环境和自然资源对人的负载力是有限的。人类的发展和其他任何生物物种一样都不能无限地增长。地球客观上存在着一个对人的可容量问题。对这个容量的估算世界各国专家的看法却大相径庭。第一类是乐观派。他们认为地球能维持的人口要比21世纪将在地球上生存的人口多得多。有人甚至断言,地球对人的可容量可以高达500亿。乐观派的根据是:地球上还有大最资源尚未开发,特别是对海洋资源包括海水和海底资源的开发利用还处于初级阶段;随着科学
On the population issue, we can not live without the earth we live in. That is because the human load on the Earth’s environment and natural resources is limited. Human development, like any other biological species, can not grow indefinitely. Objectively there is a problem of human capacity. Estimates of this capacity vary widely among experts in various countries in the world. The first is optimism. They think the Earth can sustain more people than the population that will survive on the planet in the 21st century. Some people even assert that the Earth’s human capacity can be as high as 50 billion. The optimists are based on the fact that there are still large and most untouched resources on Earth. In particular, the development and utilization of marine resources, including seawater and seabed resources, are still at an early stage. With the advent of science