三江平原黑土地，過去有的是1米厚的黑油油土地，幾年前僅剩幾十厘米厚。國家退耕還濕地，生態渴望改善

來源: 老生常談12 於 2014-06-28 13:49:37 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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