Soil erosion is the main cause for the global land degradation and also is the key problem resulting in the ecological environment deterioration, so N. n.

土壤侵蚀是土地退化的主要原因，也是导致生态环境恶化的最严重的问题，联合国粮农组织将其列为全球土地退化的首要问题。

youdao

With global environment deterioration, many parts of the world have had the land salinification.

随着全球环境的恶化，世界很多地区都发生了土地的盐渍化。

youdao

With the increasing deterioration of the ecological environment, the study on land desertification has been paid close attention in the world.

随着生态环境的日益恶化，土地荒漠化研究己经引起全球的广泛关注。

youdao

The deterioration of the agricultural land, and the onset of a wetter climate, forced Dartmoor's settlers to move away from the higher moor.

BBC: The many ages of Dartmoor