All the resultant activities have tended, on balance, to reduce tree cover and increase grassland.
总的来说，所有由此产生的活动都趋向于减少树木覆盖，增加草地。
They are now demanding a big reduction in the stipulated area of tree cover on private land.
现在，他们要求对私人用地的树木覆盖率进行大幅削减。
With the tree cover gone, every rainy season sees more of the precious topsoil washed away into the lake.
随着植被覆盖面的消失，每次雨季都将更多的宝贵的表土层冲到湖里去。
The new blanket of tree cover would bring its own weather system and rainfall, while soaking up carbon dioxide from the world's atmosphere.
这片新的树木覆盖地在吸收全球大气中二氧化碳的同时，将形成自己的天气系统，还会带来降雨。
Forests and tree cover combat land degradation and desertification by stabilizing soils, reducing water and wind erosion and maintaining nutrient cycling in soils.
通过稳定土壤，减少水蚀和风蚀并维持土壤养分循环，林木覆盖能够防止土地退化和荒漠化。
His team looked at everything from tree cover to litter to the presence of garden hoses.
他的团队查看了所有细节，包括林木植被、垃圾和花园的浇水管。
The study found that climate conditions alone could not explain the amount of tree cover in different areas.
研究发现单纯的气候条件不足以解释不同地域的树林覆盖数量。
Researchers using satellite images found at least 10% tree cover on more than one billion hectares of farmland.
研究人员利用卫星图片进行观察发现，在10亿多公顷的农田上，树木覆盖率至少为10%。
The study said that improved policies had increased tree cover but that the risks of fire and disease were growing.
该研究报告指出，改进的政策增加了林木覆盖，但是火灾和疾病的风险也越来越大。
Covering more than 100,000 hectares of the county's land area, poplars are today Siyang's principal tree species, increasing its tree cover from seven to 47 percent over the last 30 years.
在泗阳，种植面积超过10万公顷的杨树如今已成为该县的主要树种，而且过去三十年来，林木覆盖率也从最初的7%增加至47%。
Tree cover in southern Niger, for example, has increased tenfold since the devastating droughts of the 1970s.
例如自从上世纪70年代的恶劣的旱灾以来，尼日尔南部的林木覆盖率就增长了十倍。
Tree cover in southern Niger, for example, has increased tenfold since the devastating droughts of the 1970s.
例如自从上世纪70年代的恶劣的旱灾以来，尼日尔南部的林木覆盖率就增长了十倍。
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