Ecological overshoot expressed in terms of how many Earths equivalent of natural resources are consumed by humanity each year.
Ecological overshoot is the phenomenon which occurs when the demands made on a natural ecosystem exceed its regenerative capacity. Global ecological overshoot occurs when the demands made by humanity exceed what the biosphere of Earth can provide through its capacity for renewal.[1][2] Scientific use of the term in the context of the global ecological impact of humanity is attributed to a 1980 book by William R. Catton, Jr. titled Overshoot: The Ecological Basis of Revolutionary Change.[3][4][5]