气候异常、雨量过 大,这是今年洪灾不可 抗拒的自然因素。但洪 水为什么这样肆虐? 我们还要从社会学、经济学的角度来思考这个问题。 50年代以来,人口成倍增长,人多地少的矛盾日益尖锐。在长江流域180万平方公里土地上,现有人口接近4.2亿,人均耕地不到1亩。长江流域的人口,超过世界上三条大河亚马 Abnormal climate, excessive rainfall, this is an irresistible natural factor of this year’s floods. But why the flood raging? We also think from a sociological, economic point of view. Since the 1950s, the population has grown exponentially and the contradictions with fewer people and fewer people have become increasingly acute. The 1.8 million square kilometers of land in the Yangtze River Basin, the existing population of nearly 420 million, less than 1 mu of arable land per capita. The Yangtze River Valley population, more than the world’s three rivers Amazon