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United Nations Environment Programme

Global Environment Outlook


GEO Year Book 2004/5
Changing human and natural populations
Human appropriation of net primary production (NPP), as a per cent of total NPP. The local consumption rate of NPP is compared to the local production rate of NPP. Highly populated areas (yellow and red) consume up to 300 times their local production.
Source: Imhoff and others 2004

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