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It is thought that carbon dioxide emitted from inland waters, including rivers, originates from land where it is fixed by terrestrial plants, then recycled within soils and exported to surface waters. The contribution of temporary wetlands to the inland water carbon budget has been largely overlooked. The present paper finds that wetlands export large amounts of carbon to river waters in the central Amazon that can be transported dozens to hundreds of kilometres downstream before being emitted. [Source: Nature]
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