It is now supporting land management techniques which protect stream-beds, conserve vegetation and carbon in the soil.

现在，巴西正扶持土地管理技术，这可以保护河床，保持植被和土壤中的碳。

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It is essential to control population increase to lighten the burden on the land, to withdraw the farmland to the grassland and to protect thd vegetation for anti-desertification.

控制人口增长、减轻土地压力、退耕还牧和保护植被是促进当地荒漠化土地逆转所必须的。

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It is cheaper to protect vegetation and use that vegetation to regulate water flow than it is to build a dam to prevent flooding.

相对于修坝来防洪水，保护水源地的植被，通过植被来调节水资源的时空分布成本更低。

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This makes for spectacular and guaranteed crane viewing, but also means that ongoing projects, including clearing vegetation off the sandbars with heavy machinery each year, are needed to protect this last stretch of habitat, not just for sandhill cranes but also for the endangered whooping cranes who migrate through the area around the same time, and of which there are only 300 left in the wild.

BBC: Nebraska��s awe-inspiring crane migration