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地球上占陆地面积1/3的干旱、半干旱地区,是人类社会进行新开发的希望所在。目前世界各国对这类地区都给予很大的关注和重视。目前地球上人口已经超过50亿,这么多的人口今后应向何处发展,有些科学家提出有三条途径;一是向海洋和太空发展;二是向极地,尤其是南极发展;三是向干旱区发展。显然,占领干旱区要比前二种更为容易也更适合于人类的生存。
The arid and semi-arid regions that occupy 1/3 of the land area on Earth are the hope of new development in human society. At present, all countries in the world have given great attention and attention to these areas. At present, there are more than 5 billion people on Earth. Where so many people should go in the future, some scientists have proposed three ways; one is to develop to the sea and space; the other is to develop to the polar regions, especially the Antarctic; the other is to develop arid regions development of. Obviously, it is easier and more suitable to occupy arid areas than the former two.