过去30年里，*帮助数亿人民脱离了贫困，然而随着*城市化和工业化发展、森林补植方案的开展和受自然灾害影响，*自1997年以来已经丧失了820万公顷耕地。目前*37%的土地在退化，*人均可使用土地面积是世界平均水平的40%。不仅如此，更有许多土地因为各种原因被侵蚀而无法再被利用。目前*耕地面积缩减，使得*保持现有农业产出的能力面临威胁，城乡差距扩大也对*人享有的粮食权利提出挑战。那么，如何利用保护土地资源英语作文怎么写呢？  

  How to protect land   如何保护土地   Soil is a finite resource that cannot be substituted on a large scale as a basis for food production and many other essential ecosystem services such as nutrient recycling, water purification, habitat of organisms and many more. Nonetheless, fertile soil continues to be degraded and polluted directly or indirectly through open-cast mining, deforestation, overgrazing of pasture land, over-intensive agriculture, conversion of farmland into infrastructural and building areas, waste disposal, inputs of detrimental substances released through traffic, households and industrial activities into the atmosphere and other human activities.   Protecting the quality of our soils is as important as protecting the air we breathe and the water we drink. Protecting soil is critical to protecting our ecosystems and our ability to raise crops or maintain a backyard garden.   Soil quality can be a measure of soil productivity. Soil quality can also be linked to water quality.   Specifically, soil quality is the capacity of soil to function within ecosystem boundaries to sustain biological productivity, maintain environmental quality, and promote plant and animal health. Soil quality focuses not just on characteristics such as nutrient availability and total organic matter levels, but also focuses on overall soil biological activity, organic matter content, water infiltration, and soil structure.   Protecting and enhancing soil quality is accomplished through the use of soil conservation efforts; Best Management Practices for fertilizers and pesticides; and the proper use, handling and storage of agricultural chemicals, fertilizers, manures and soil amendments.   With the human population still growing, urbanization increasing and climate conditions changing, the protection of this essential resource is not only more urgent than ever, but is also facing completely new challenges in the future.   In response to these challenges, the mission of the Soil Protection group is to establish scientific knowledge required to sustain and manage the quality of soil as an essential basis for human and other life. This includes:early detection and identification of developments threatening ecological soil functionsassessment of physical, chemical and biological stresses on soil and their impacts on soil quality and functioningcharacterization of risks for man and environment deriving from soil pollution and degradationdevelopment and evaluation of counter-measures against such threats and adverse impacts and of ways for a sustainable use of soil functions   土地（Land）指地球表层（epigeosphere）的陆地部分及其以上、以下一定幅度空间范围内的全部环境要素（environmental elements），以及人类社会生产生活活动作用于空间的某些结果所组成的自然――经济综合体。狭义的土地，仅指陆地部分，这种观点较有代表性的是土地规划（land-use program）专家和自然地理学家的观点。广义的土地，不仅包括陆地部分，而且还包括光、热、空气、海洋……。