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吉林市郊区矿产资源比较丰富,有的工矿在开采利用资源的同时,缺少保护资源的有力措施,严重地破坏了地表植被,造成新的水土流失。据调查发现,在郊区范围内,仅从事开矿、烧窑、取土、采石、挖矿等项活动的单位就有287个,共占用土地面积20万亩,平均每年破坏植被面积1134亩,堆弃压没植被面积335亩,开采土石砂料615.6万立方米。为了合理地开发利用和保护水土资源,几年
There are abundant mineral resources in the suburb of Jilin City. Some mines and mines, while exploiting and utilizing resources, lack powerful measures to protect resources and seriously damage surface vegetation and cause new soil and water loss. According to the survey, only 287 units engaged in activities such as mining, kiln burning, earth borrowing, quarrying and mining have been found in suburban areas, covering a total land area of 200,000 mu and an average annual area of 1134 mu of damaged vegetation, Heap abandoned pressure not vegetation area of 335 mu, 615,600 cubic meters of earth and sand mining. In order to develop, utilize and protect water and soil resources reasonably, how many years?