Increased atmospheric CO2 enhances grassland biomass production under average conditions, but contrary to earlier predictions the effect declines when it gets wetter, drier, or hotter.
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Nowak, R. Average is best. Nature Clim Change 7, 101–102 (2017). https://doi.org/10.1038/nclimate3212
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DOI: https://doi.org/10.1038/nclimate3212
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