全世界有13亿人口生活在已无承受能力的脆弱的土地上-包括干旱地区、坡地、湿地和森林。
Globally, 1.3 billion people live on fragile lands - arid zones, slopes, wetlands, and forests - that cannot sustain them.
干旱缺水是提高干热河谷旱坡地粮食产量和提高植树造林成活率的主要制约因素。
Drought and water shortage is the main restrictive factor to heighten grain output of dry slope land and the afforestation survival rate in Yuanmou dry hot valley.
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