Human overharvesting of natural resources has contributed to reducing the Earth's net primary productivity.

Net primary productivity (NPP) refers to the amount of carbon uptake after subtracting Plant Respiration (RES) from Gross Primary Productivity (GPP). Human overharvesting affects biodiversity and ecosystem services but does not directly reduce the Earth's overall net primary productivity. NPP is more directly influenced by factors such as sunlight, temperature, and water availability.