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. 2019 Aug 20;14:14. doi: 10.1186/s13062-019-0247-8

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© The Author(s). 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — The fast carbon cycle (numbers are approximate). In the steady state (no anthropogenic sources) 120 of the 800 GtC of atmospheric carbon is absorbed and released by terrestrial life during annual cycles of growth and decay. http://earthobservatory.nasa.gov/Features/CarbonCycle/adapted.fromU.S.DOE,Biological.and.Environmental.Research.Information.System