Response or Comment
Environmental Research Letters
Abdi et al (2014 Environ. Res. Lett. 9 094003), have adapted the concept of comparing supply and demand of annual plant production known as human appropriation of net primary production (HANPP) to a region of the Sahel with rapid population growth. They found that HANPP more than doubled over the study period of 2000–2010, from 19% to 41%, suggesting increasing vulnerability of these populations to food insecurity.
© 2014 IOP Publishing Ltd
Steven W Running 2014 Environ. Res. Lett. 9 111003 doi:10.1088/1748-9326/9/11/111003
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