天蓝海蓝,山美水美是全人类都在追求的梦想,但世界环境问题的现状却让人非常痛心,就以中国的环境现状为例,早在建国前由于几次大的迁徙使我国约30%的土地不可居住,建国后由于水土流失等诸多原因又减少了约30%的土地面积,而人口却在疯长,更不幸的是越是贫穷的、水土流失越是严重的地区人口增长越快。再说说环 Sky blue sea, beauty and beauty are the dreams pursued by all mankind. However, the status quo of the world environmental problems is very distressing. Taking the current environmental situation in China as an example, as early as before the founding of the PRC, due to several major migrations, 30% of the land is uninhabitable. After the founding of the People’s Republic of China, about 30% of the land area has been reduced due to water and soil loss and other reasons. However, the population is soaring and, more unfortunately, the poorer, the more serious the soil erosion is, the more population growth fast. Let me talk about the ring