Ecophagy

global ecophagy
Ecophagy is a term coined by Robert Freitas that means the literal consumption of an ecosystem.wikipedia
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Gray goo

grey gooGrey goo scenarionanovirus plague
In this situation (called the grey goo scenario) out-of-control self-replicating nanorobots consume entire ecosystems, resulting in global ecophagy.
Gray goo (also spelled grey goo) is a hypothetical global catastrophic scenario involving molecular nanotechnology in which out-of-control self-replicating machines consume all biomass on Earth while building more of themselves, a scenario that has been called ecophagy ("eating the environment", more literally "eating the habitation").

Molecular nanotechnology

nanotechnologyadvanced nanotechnologymolecular
Freitas used the term to describe a scenario involving molecular nanotechnology gone awry.
Some commentators have referred to this situation as the "grey goo" or "ecophagy" scenario.

Robert Freitas

Robert A. Freitas Jr.Robert A. Freitas Jr
Ecophagy is a term coined by Robert Freitas that means the literal consumption of an ecosystem.
* Ecophagy

Self-replicating machine

Clanking replicatorself-replicatingself-replicating machines
In this situation (called the grey goo scenario) out-of-control self-replicating nanorobots consume entire ecosystems, resulting in global ecophagy.

Molecular assembler

molecular manufacturinguniversal assemblerUniversal Constructor
This has been called ecophagy or the grey goo problem.

Ecosystem

ecosystemsenvironmenteco-system
Ecophagy is a term coined by Robert Freitas that means the literal consumption of an ecosystem.

Greek language

GreekAncient GreekModern Greek
It derives from the Greek "οἶκος" (oikos), which refers to a "house" or "household", and the Greek "φαγεῖν" (phagein), "to eat".

Monoculture

monoculturesmonoculturalmonospecific
However, the word "ecophagy" is now applied more generally in reference to any event—nuclear war, the spread of monoculture, massive species extinctions—that might fundamentally alter the planet.

Ecological collapse

environmental collapseCarboniferous Rainforest Collapsecollapse of the farming culture
Scholars suggest that these events might result in ecocide in that they would undermine the capacity of the Earth's biological population to repair itself.

Human overpopulation

overpopulationexpanding human populationoverpopulated
Others suggest that more mundane and less spectacular events—the unrelenting growth of the human population, the steady transformation of the natural world by human beings—will eventually result in a planet that is considerably less vibrant, and one that is, apart from humans, essentially lifeless.

Evolution (Baxter novel)

EvolutionEvolution'' (Baxter novel)
At one point, hominids become sapient, and go on to develop technology, including an evolving universal constructor machine that goes to Mars and multiplies, and in an act of global ecophagy consumes Mars by converting the planet into a mass of machinery that leaves the Solar system in search of new planets to assimilate.

Mechanosynthesis

mechanically positioning reactive molecules
In part to resolve this and related questions about the dangers of industrial accidents and popular fears of runaway events equivalent to Chernobyl and Bhopal disasters, and the more remote issue of ecophagy, grey goo and green goo (various potential disasters arising from runaway replicators, which could be built using mechanosynthesis) the UK Royal Society and UK Royal Academy of Engineering in 2003 commissioned a study to deal with these issues and larger social and ecological implications, led by mechanical engineering professor Ann Dowling.

Grey

Graylight greyneutral color
Grey goo is a hypothetical end-of-the-world scenario, also known as ecophagy: out-of-control self-replicating nanobots consume all living matter on Earth while building more of themselves.