论文部分内容阅读
1978年国务院正式批准在我国西北、华北北部和东北西部建设一项规模宏大的绿化工程,其主要任务就是在12个省(市、区)466个县,占国土面积41%的土地上,建设具有多功能的绿色屏
In 1978, the State Council formally approved the construction of a large-scale afforestation project in northwestern China, northern North China and western North China. The main task of the State Council was to build 466 counties in 12 provinces (cities and districts) with a land area of 41% With multi-function green screen