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Human carrying capacity is a function of how people live and the technology at their disposal. The two great economic revolutions that marked human history up to 1900—the agricultural and industrial revolutions—greatly ramped up Earth's human carrying capacity, from 5 to 10 million people 10,000 BCE to 1.5 billion in 1900.
Talk of economic and population growth overshooting the limits of Earth's carrying capacity for humans is popular in environmentalism. The potential limiting factor for the human population might include water availability, energy availability, renewable resources , non-renewable resources , heat removal, photosynthetic capacity , or land ...
Global biocapacity' is a term sometimes used to describe the total capacity of an ecosystem to support various continuous activity and changes. When the ecological footprint of a population exceeds the biocapacity of the environment it lives in, this is called an 'biocapacity deficit'. Such a deficit comes from three sources: overusing one's ...
Ecological overshoot. 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 ...
According to the Global Footprint Network's calculations, currently people use Earth's resources at approximately 171% of capacity. This implies that humanity is well over Earth's human carrying capacity at current levels of affluence. According to the GFN: In 2023, Earth Overshoot Day fell on August 2nd. Earth Overshoot Day marks the date when ...
Earth Overshoot Day (EOD) is the calculated illustrative calendar date on which humanity's resource consumption for the year exceeds Earth’s capacity to regenerate those resources that year. The term " overshoot " represents the level by which human population's demand overshoots the sustainable amount of biological resources regenerated on ...
The 1972 book The Limits to Growth discussed the limits to growth of society as a whole. This book included a computer-based model which predicted that the Earth would reach a carrying capacity of ten to fourteen billion people after some two hundred years, after which the human population would collapse.
The global hectare is a useful measure of biocapacity as it can convert things like human dietary requirements into common units, which can show how many people a certain region on earth can sustain, assuming current technologies and agricultural methods. It can be used as a way of determining the relative carrying capacity of the earth.