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Nature 416, 594 (11 April 2002) | doi:10.1038/416594b

Global change: Carbon dioxide goes with the flow

John Grace & Yadvinder Malhi1

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Measurements of the rate at which carbon dioxide is released from rivers running through tropical forests provide a surprise. They will help in developing an improved picture of the carbon cycle.

Rainforests contain not only trees but also lots of water, largely in the form of river systems. The Amazon is by far the largest such system in the world, contributing 20% of all water flowing from rivers to the ocean.