It's a global effort with a multibillion dollar price tag. Among its aims: re-greening nearly 250 million acres, planting 4,000 miles of trees, helping farmers, creating jobs, sequestering carbon.
(Image credit: Tommy Trenchard for NPR)
绿色长城是世界上最雄心勃勃的生态项目之一。有效吗？
这是一项耗资数十亿美元的全球努力。其目标包括：重新绿化近 2.5 亿英亩土地、种植 4,000 英里树木、帮助农民、创造就业机会、固碳。
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来源: NPR News
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