Human Appropriation of Net Primary Productivity
Description
Sedac:
"An analysis of global patterns in human consumption of net primary productivity (NPP). NPP—the net amount of solar energy converted to plant organic matter through photosynthesis—can be measured in units of elemental carbon and represents the primary food energy source for the world's ecosystems. Human appropriation of net primary productivity (HANPP), through the consumption of food, paper, wood and fiber, alters the composition of the atmosphere, levels of biodiversity, energy flows within food webs and the provision of important ecosystem services. "