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. 2016 Mar 5;9:53. doi: 10.1186/s13068-016-0468-3

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© Janssen et al. 2016

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. 3 — Correlation between the ethanol yield of the process configurations and their environmental impacts. The impact categories are: a global warming potential (GWP); b eutrophication potential (EP); c acidification potential (AP); d photochemical ozone creation potential (POCP). The linear trend line (in blue) and the 95 % confidence intervals (in gray) are given. The correlation coefficients ( $r^{2}$ ) are mentioned in each graph