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Terms for subject Environment containing cover | all forms | exact matches only
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forest cover destruction Destruction of forests is carried out in many countries in order to provide new land for agricultural or livestock purposes. It is often done without factors such as climate and topography having been sufficiently studied and on lands where slope nature of the soil or other physiographic characteristics clearly indicate that the land involved is suitable only for forest. Although these practices may lead to a temporary increase in productivity, there are also many indications that in the long run there is usually a decrease in productivity per unit of surface and that erosion and irreversible soil deterioration often accompany this process. Many factors contribute to forest cover destruction: timber production, clearance for agriculture, cutting for firewood and charcoal, fires, droughts, strip mining, pollution, urban development, population pressures, and warfare森林植被破坏 (森林的破坏在许多国家都在进行,为农业或畜牧业提供了新的土地。这种开发通常没有经过对气候地形的充分研究,通常也没有考虑这片土地的斜坡性质或其他自然地理特征可能只适合森林。虽然这些做法可能导致暂时增加生产力,从长远来说,通常在每单位面积的生产力下降,土壤的侵蚀和不可逆转的恶化往往伴随着这一过程。许多因素造成了森林覆盖率的破坏:木材生产,农业需要,为切割金属而需要的木柴和木炭,火灾,旱灾,条带开采,污染,城市发展,人口的压力,和战争。)
land cover Land cover is the physical state of the land surface. It is the combination of vegetation, soil, rock, water and human-made structures, which make up the earth's landscape. The land cover is the interface between the earth's crust and the atmosphere, influencing the exchange of energy and matter in the climatic system and biogeochemical cycles土地覆盖 (土地覆盖是指陆地表面的物理状态。它是植被、土壤、岩石、水和人工建筑的联合体,这些构成了地球的景观。土地覆盖,是地壳和大气之间的交界面,影响能源和物质在大气系统和生物地球化学循环间的交换。)
landfill covering The protective shielding, consisting of soil or some other material, that encloses disposal sites for compacted, non-hazardous solid waste, or secures disposal sites for hazardous waste to minimize the chance of releasing hazardous substances into the environment垃圾填埋场覆盖 (由土壤或其他物质组成的保护性屏障,用来将已经压缩过的、无害的固体废弃物进行覆盖,或保障处理有害废物的处置场所,以尽量减少将有害物质释放到环境中的几率。)
vegetation cover Number of plants growing on a certain area of land植被覆盖 (在特定地区的土地上生长的许多植物。)