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Food security

Fertilizing hidden hunger

Atmospheric CO2 fertilization may go some way to compensating the negative impact of climatic changes on crop yields, but it comes at the expense of a deterioration of the current nutritional value of food.

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Figure 1: Currently, the C3-crops wheat, rice and soy provide almost 40% of the world's food calorie supply (left) as well as significant shares of iron, zinc and proteins (current levels represented as thirds of the plate area).

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Correspondence to Christoph Müller.

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Müller, C., Elliott, J. & Levermann, A. Fertilizing hidden hunger. Nature Clim Change 4, 540–541 (2014). https://doi.org/10.1038/nclimate2290

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  • DOI: https://doi.org/10.1038/nclimate2290

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