论文部分内容阅读
一、利用再生资源是一个全球性的战略问题资源,是人类社会赖以存在和发展的物质基础。然而,地球上的全部矿物只占地壳质量的0.4%左右,其中可视为资源储量的又只有很小的一部分。并且,随着社会发展的需要,资源的开采和消耗越来越快,有人估计,地球上的金属矿产资源,大多只能再开采几十年时间。因此,节约和合理利用资源,已成为世界各国制定国策时所必须重视的一个问题。一般来说,资源可以分为可再生资源和非再生资源两大类。可再生资源中,象日光、空气、水、土、生物等,是属于可自然再生的资源;象金属、非金属矿产等,虽然使用后不能
I. Utilizing renewable resources is a global resource for strategic issues and a material basis for the existence and development of human society. However, all the earth’s minerals are only about 0.4% of the crust, which can be seen as only a small part of the reserves. And, as the needs of social development, resources exploitation and consumption faster and faster, it was estimated that most of the earth’s metal mineral resources, most can only be exploited for decades. Therefore, saving and rationalizing the use of resources has become a problem that countries in the world must pay attention to when formulating their national policies. In general, resources can be divided into two major categories of renewable resources and non-renewable resources. Renewable resources, such as sunlight, air, water, soil, biology, etc., belong to natural regeneration of resources; like metals, non-metallic minerals, although after use can not