Decades of overgrazing, climate change-induced droughts, and poor farming practices are stripping not only the Sudanian grasslands of their once fertile topsoil but hundreds of other regions like it across the world.

几十年度放牧、气候变化引发干旱和不良方式，不仅使苏丹草原失去了曾经肥沃表土，也使世界上其他数百个类似地区失去了表土。

Elk were overgrazing the grassland, causing damage to the precious eco-system.

麋鹿在草原上度啃草，对宝贵生态系统造成了破坏。

" Imbalance between the supply of and demand for animal forage lands leads to overgrazing, invasive species, and the increased risk of drought and wildfires -- all of which accelerate desertification and land degradation trends around the world, "

“动物饲草地供需失衡导致度放牧、物种入侵以及干旱和野火风险增加，所有这些都加速了全球各地荒漠化和土地退化趋势。”

Firstly, overgrazing and intensive cropping are two ancient but destructive practices that lead to the loss of soil fertility.

首先，度放牧和集约化种植是两种古老但具有破坏性做法，会导致土壤肥力丧失。

For a century, this land had been overgrazed by livestock, like most grasslands around the world.

这片土地就像世界各地大部分草地一样，经历了长达一个世纪度放牧。

This economic reliance on livestock in certain regions makes large tracts of land susceptible to overgrazing.

在某些地区，家畜是人们主要经济来源，大量土地因此而遭受度放牧风险。

Therefore, loss of topsoil from overgrazing, over-cultivation, or bad livestock management in areas neighbouring deserts will contribute to the continuing expansion of those arid regions.

因此，在邻近沙漠地区，度放牧、度糕牲畜管理导致表土流失，将导致这些干旱地区持续扩张。

An otter's appetite protects the kelp forest from being overgrazed.

水獭胃口保护了海带森林免遭度啃食。

Together, increased demand, overgrazing, and climate change mean that cashmere is getting worse.

需求增加、度放牧和气候变化共同导致开司米质量下降。

The phenomenon was first described in a pamphlet by economist William Forster Lloyd in 1833 in a discussion of the overgrazing of cattle on village common areas.

这种现象最初由经济学家威廉·福斯特·洛伊德于1833年在一本小册子中描述，当时他在讨论村庄公共区域上牛群度放牧问题。

There was also increasing soil erosion in the area, which they said was threatening Petra from overgrazing livestock and uprooting trees for firewood.

该地区土壤侵蚀也在加剧，他们表示这威胁到了佩特拉， 因为度放牧牲畜和砍伐树木为燃料。

Europe, which experienced the highest overall percentage of land degradation at 23%, also faced challenges from overcultivation, 7.7%, and overgrazing, 5.5%.

欧洲土地退化总体百分比最高，为 23%，但也面临着度 （7.7%） 和度放牧 （5.5%） 挑战。

Hardin argued that these situations pit short-term self-interest against the common good, and they end badly for everyone, resulting in overgrazing, overfishing, overpopulation, pollution, and other social and environmental problems.

哈丁认为，这些情形将短期个人利益与公共利益对立起来，最终对所有人都不利，导致度放牧、度捕捞、人口剩、污染以及其他社会和环境问题。

Unfortunately, the ranchers overgrazed their land, leading to widespread starvation of their herds in the decade that followed.

不幸是，牧场主度放牧他们土地，导致他们牛群在接下来十年里普遍挨饿。

That can lead to destructive overgrazing.

这可能导致破坏性度放牧。

The urchin keep the otter healthy and fed, and the otter eating the urchin keeps the kelp from being overgrazed.

海胆维系着海獭健康与食物供给，而海獭捕食海胆则防止了海藻被度啃食。

This contrasts with Oceania and North America, where overgrazing and overcultivation were more prevalent causes of degradation.

替代医疗加入主流治疗吗。

In comparison, Oceania, with 13% of its farmland degraded, was predominantly affected by overgrazing, 11.3%.

相比之下，大洋洲 13% 农田退化，主要受到度放牧影响，为 11.3%。

North America had a relatively lower incidence of degraded land at 5%, with overcultivation, 3.3%, and overgrazing, 1.5%, being the main causes.

北美土地退化发生率相对较低，为 5%，其中度种 （3.3%） 和度放牧 （1.5%） 是主要原因。