ナショナルジオグラフィックのインスタグラム(natgeo) - 4月22日 22時45分

Photo // @dguttenfelder David Guttenfelder.

Workers load sacks of rice on to a canal boat in Vietnam's Mekong Delta. The humid delta, fertilized by Mekong River sediment, has allowed Vietnam to become a major rice exporter. Newly constructed hydroelectric dams on the river's main stem will trap fertile sediments upstream, threatening harvests.

Please take a look at our new story "Harnessing the Mekong or Killing It?" in the May issue of National Geographic by photographer @dguttenfelder, writer @rhymeswithmyhouse and photo editor @roseleen.

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