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Anthroposphere
View on WikipediaThe anthroposphere refers to that part of the Earth system that is inhabited and influenced by humans[1]. The term has been included as one of the Earth's spheres[2], building on a concept first coined by Austrian geologist Eduard Suess[3].
While the biosphere is the total biomass of the Earth and its interaction with its systems, the anthroposphere includes the total mass of human-generated systems and materials, including the human population, crops and livestock, and its interaction with the Earth's systems. A recent study estimated the mass of nonliving anthropogenic creations as 1.1 trillion tons in 2020, equivalent to the mass of all living organisms that comprise the biosphere[4]. As human technology has become more evolved, such as that required to launch objects into orbit or to cause deforestation, the impact of human activities on the environment has increased. The anthroposphere is the youngest of all the Earth's spheres, yet has made an enormous impact on the Earth and its systems in a very short time.[5]
Some consider the term anthroposphere to be synonymous with the noosphere, though the noosphere is often used to refer specifically to the sphere of rational human thought, or ‘the terrestrial sphere of thinking substance’.[6] The anthroposphere is also closely related to the concept of the technosphere[7][8] developed by geologist Peter Haff, historian of science Jürgen Renn, and others[9], which refers to all of the technological objects and systems manufactured and created by humans. The technosphere is distinct from the anthroposphere in these sense that the anthroposphere encompasses not only technologies but cultural, social, economic, and political systems, as well as human behaviors and practices.
Aspects of the anthroposphere include: mines from which minerals are obtained; mechanized agriculture and transportation which support the global food system; oil and gas fields; computer-based systems including the Internet; educational systems; landfills; factories; atmospheric pollution; artificial satellites in space, both active satellites and space junk; forestry and deforestation; urban development; transportation systems including roads, highways, and subways; nuclear installations; warfare.
Technofossils are another interesting aspect of the anthroposphere. These can include objects like mobile phones that contain a diverse range of metals and man-made materials, raw materials like aluminum that do not exist in nature, and agglomerations of plastics created in areas like the Pacific Garbage Patch and on the beaches of the Pacific Islands.[10]
See also
[edit]References
[edit]- ^ Quilley, Stephen (2011). "Entropy, the anthroposphere and the ecology of civilization: An essay on the problem of 'liberalism in one village' in the long view". The Sociological Review. 59 (1): 65–90. doi:10.1111/j.1467-954X.2011.01979.x.
- ^ Huggett, Richard (2024). "Earth's spheres: Conceptual and definitional debates". Progress in Physical Geography. 48 (5–6): 651–670. Bibcode:2024PrPG...48..651H. doi:10.1177/03091333241275465.
- ^ Suess E (1875). Die Entsehung der Alpen. Wien: Wilhelm Braumüller
- ^ Elhacham, Emily; Ben-Uri, Liad; Grozovski, Jonathan; Bar-On, Yinon; Milo, Ron (2020). "Global human-made mass exceeds all living biomass". Nature. 588 (7838): 442–444. Bibcode:2020Natur.588..442E. doi:10.1038/s41586-020-3010-5. PMID 33299177.
- ^ Haff, P. K. (2013-10-24). "Technology as a geological phenomenon: implications for human well-being". Geological Society, London, Special Publications. 395 (1). Geological Society of London: 301–309. doi:10.1144/sp395.4. ISSN 0305-8719.
- ^ Teilhard de Chardin, Pierre (1964). The Future of Man. London: Collins. p. 157.
- ^ Renn, Jürgen (June 2022). "From the History of Science to Geoanthropology". Isis. 113 (2): 377–385. doi:10.1086/719703.https://www.journals.uchicago.edu/doi/10.1086/719703
- ^ Hermann-Pillath, Carsten (2018). "The Case for a New Discipline: Technosphere Science". Ecological Economics. 149: 212–225. Bibcode:2018EcoEc.149..212H. doi:10.1016/j.ecolecon.2018.03.024.
- ^ Zalasiewicz, Jan (28 March 2018). "The unbearable burden of the technosphere". UNESCO. Archived from the original on 18 August 2024. Retrieved 29 September 2024.
- ^ Zalasiewicz, Jan (2017). "Scale and diversity of the physical technosphere: A geological perspective". The Anthropocene Review. 4 (1): 9–22. Bibcode:2017AntRv...4....9Z. doi:10.1177/2053019616677743. hdl:11250/2553087.
External links
[edit]Anthroposphere
View on GrokipediaDefinition and Conceptual Foundations
Core Definition
The anthroposphere encompasses the aggregate of human-made or human-modified components within the Earth system, including built structures, technological artifacts, agricultural landscapes, and the socioeconomic activities that shape and sustain them. This sphere represents the domain where human interventions—such as urbanization, resource extraction, and industrial processes—predominantly alter natural processes, often at scales that influence global biogeochemical cycles. Unlike the biosphere, which is defined by living organisms and their interactions, the anthroposphere emphasizes anthropogenic modifications that extend beyond biological entities to include non-living constructs like roads, dams, and energy grids.[3][5] Key elements of the anthroposphere include urban settlements covering approximately 1% of Earth's land surface but housing over 50% of the global population as of 2020, expansive agricultural systems that have transformed about 40% of ice-free land for crop production and pastures, and infrastructure networks spanning billions of kilometers in roads and pipelines. These components not only facilitate human habitation and economic output but also generate feedback loops with other Earth spheres, such as the emission of greenhouse gases that have increased atmospheric CO2 concentrations from 280 ppm pre-industrially to over 420 ppm by 2023. The anthroposphere's dynamism stems from ongoing technological innovation and population growth, which reached 8 billion in 2022, amplifying its spatial and material footprint.[6][7] In conceptual terms, the anthroposphere integrates cultural, technological, and behavioral dimensions of human society, distinguishing it from narrower constructs like the technosphere, which focuses primarily on inanimate artifacts and machinery. While the technosphere highlights the physical mass of human constructs—estimated to exceed the biosphere's biomass by a factor of two as of recent analyses—the anthroposphere broader incorporates the causal agencies of human decision-making and adaptation that drive systemic changes. This holistic view underscores the anthroposphere's role as an emergent layer in the Earth system, where human agency increasingly rivals geological and climatic forces in shaping planetary evolution.[5][3]Etymology and Historical Coinage
The term anthroposphere is formed from the Ancient Greek ánthrōpos (ἄνθρωπος), signifying "human" or "person", and sphaîra (σφαῖρα), meaning "sphere" or "ball".[8] This neologism denotes the human-influenced layer of the Earth system, analogous to other planetary spheres like the biosphere or hydrosphere.[5] Russian geographer and anthropologist Dmitry Nikolayevich Anuchin (1841–1923) introduced the term in 1902 during a lecture on human impacts on geography, framing it as the realm shaped by societal and cultural activities.[9] Anuchin's usage emphasized the distinct geological and environmental footprint of human populations, predating broader adoption in Earth system science.[10] Although frequently attributed to Austrian geologist Eduard Suess due to his 1862 analysis of urban sedimentary layers (Schuttdecke) as anthropogenic units, Suess did not employ the word anthroposphere, which first appears in records from Anuchin's era.[11] The concept's coinage reflects early 20th-century recognition of humanity as a transformative geological force, gaining prominence amid discussions of industrialization's global effects.[3]Distinctions from Related Concepts
The anthroposphere differs from the four classical Earth spheres—atmosphere, hydrosphere, lithosphere (or geosphere), and biosphere—which delineate the planet's gaseous envelope, water bodies, solid crust, and zone of life, respectively. These spheres primarily describe abiotic and biotic natural processes independent of human agency, whereas the anthroposphere represents the overlay of human modifications, including settlements, agriculture, and infrastructure, that alter and integrate with those domains.[12][11] In contrast to the technosphere, which comprises the physical network of human-engineered artifacts such as machinery, buildings, and transport systems, the anthroposphere extends to encompass sociocultural, economic, and institutional dimensions of human activity. Scholarly analyses position the technosphere as a material subset within the broader anthroposphere, emphasizing the latter's inclusion of non-technological human elements like governance and resource management practices.[4][13] The anthroposphere is distinct from the noosphere, a concept advanced by Vladimir Vernadsky and Pierre Teilhard de Chardin denoting the evolutionary emergence of human intellect and rational organization as a planetary force succeeding the biosphere. While the noosphere highlights cognitive and ethical dimensions of human influence, the anthroposphere prioritizes empirical, observable human imprints on the physical environment through production and consumption.[14][15] Unlike the Anthropocene, which designates a stratigraphic epoch—proposed to commence around 1950 based on markers like nuclear fallout and plastic proliferation—the anthroposphere functions as a systemic descriptor of ongoing human dominion over Earth processes rather than a temporal boundary.[16][17]Historical Evolution
Early Human Modifications
The controlled use of fire by early hominins represents the initial systematic modification of natural landscapes, with archaeological evidence indicating habitual fire employment dating to at least 1 million years ago in Africa. This practice facilitated cooking, which expanded dietary options and reduced reliance on raw foods, but also enabled intentional burning to clear vegetation, drive game, and alter vegetation structure for easier foraging.[18][19] Repeated fires in regions such as Zambia around 125,000 years ago prevented woody regrowth, transitioning closed forests to persistent open grasslands and shrublands that favored human mobility and resource access.[20] Hunter-gatherer populations further reshaped ecosystems through widespread landscape burning, a technique employed globally by Homo sapiens after their dispersal from Africa beginning approximately 70,000–50,000 years ago. These fires promoted herbaceous vegetation over forests, enhanced biodiversity in targeted patches for attracting prey, and reduced fuel loads to mitigate uncontrolled wildfires, thereby creating anthropogenic fire regimes distinct from natural ones. In Tasmania, arriving humans around 41,000 years ago used fire to convert wet forests into open grasslands within 2,000 years, demonstrating rapid ecological restructuring. Evidence from sediment cores and charcoal layers confirms that such practices intensified post-human arrival, with fire frequency increasing by factors of 2–4 in affected biomes.[21][22] Human hunting pressure contributed decisively to the late Quaternary megafauna extinctions, with over 150 genera of large mammals (>44 kg body mass) disappearing between 50,000 and 10,000 years ago, coinciding precisely with Homo sapiens expansions into new continents rather than isolated climate shifts. In Australia and the Americas, extinction waves followed human colonization by 1,000–2,000 years, with no comparable losses in uncolonized refugia; statistical models attribute 50–100% of these events to overhunting, as human population densities as low as 0.1–1 person per 100 km² sufficed to drive population crashes in low-reproductive-rate species like mammoths and giant sloths. This selective removal of apex herbivores disrupted seed dispersal, grazing dynamics, and nutrient cycling, leading to cascading vegetation changes such as shrub encroachment and reduced forest cover in formerly megafauna-dominated ecosystems.[23][24][25] These Paleolithic modifications laid foundational anthropospheric patterns by prioritizing human utility over natural equilibria, with fire and predation establishing mosaics of managed habitats that prefigured later agricultural intensification. By the end of the Pleistocene, human-induced biome shifts covered approximately 10–20% of continental land surfaces, as inferred from pollen and macrofossil records showing elevated charcoal and altered flora unrelated to orbital forcings. Such alterations enhanced short-term human survival but initiated long-term dependencies on engineered environments.[26][27]Industrial and Technological Revolutions
The First Industrial Revolution, originating in Britain from the mid-18th century to around 1830, initiated a profound expansion of the anthroposphere by transitioning economies from manual labor and agrarian systems to mechanized production centered in factories.[28] Innovations including James Watt's improved steam engine in 1769 and mechanized textile machinery enabled the concentration of workers in industrial hubs, fostering the construction of mills, ironworks, and supporting infrastructure like canals and early roadways to transport coal, raw materials, and goods.[28] This shift drove unprecedented urbanization, as rural populations migrated to cities for factory employment; in Britain, the urban share of the population rose from about 20% in 1800 to over 50% by 1850, compelling the rapid development of dense built environments including worker housing and basic sanitation systems amid initial infrastructural strains.[29] The Second Industrial Revolution, spanning roughly 1870 to 1914 and centered in Europe and the United States, amplified the anthroposphere's scale through electrification, advanced metallurgy, and mass production techniques. Key advancements such as the Bessemer process for cheap steel production in 1856 and Thomas Edison's practical incandescent light bulb in 1879 facilitated skyscrapers, electrified urban grids, and expansive rail networks; by 1900, U.S. railroads spanned over 190,000 miles, linking resource extraction sites to manufacturing centers and ports.[30][31] The internal combustion engine and assembly line innovations, refined by Henry Ford in 1913, spurred automobile adoption, extending human-modified landscapes into suburban sprawl and highway precursors while boosting global trade infrastructure. These changes increased the anthroposphere's material footprint, with steel output surging from 0.5 million tons globally in 1870 to 28 million tons by 1900, underpinning denser settlements and industrial complexes.[32] Twentieth-century technological revolutions further globalized and densified the anthroposphere, integrating aviation, nuclear energy, and digital systems into physical infrastructures.[33] The widespread adoption of automobiles after 1918 prompted massive road-building programs, such as the U.S. Interstate Highway System initiated in 1956, which by 1970 encompassed over 40,000 miles and reshaped land use for mobility and commerce.[34] Aviation's commercialization from the 1920s onward required airfields and terminals, expanding anthropospheric nodes into remote areas; global air traffic grew from negligible in 1930 to carrying 2.5 billion passengers annually by 2019, supported by standardized runways and control towers.[34] Post-World War II computing and telecommunications revolutions underpinned logistical networks for resource flows, while energy infrastructures like nuclear plants—first operational in 1954—intensified the anthroposphere's energy-dependent built forms, with global electricity generation rising from 1,000 terawatt-hours in 1950 to over 25,000 by 2010.[6] These developments correlated with urban population growth to 55% of the world total by 2018, reflecting the anthroposphere's dominance over natural landscapes through engineered connectivity and extraction systems.[7]20th-Century Expansion and Global Reach
The global human population grew from approximately 1.6 billion in 1900 to 6.1 billion by 2000, exerting unprecedented pressure on Earth's surface through expanded settlements, agriculture, and resource use.[35] This demographic surge, driven by advances in medicine, sanitation, and food production, amplified the anthroposphere's footprint, as humans converted vast rural and wilderness areas into managed landscapes. By mid-century, innovations like hybrid seeds and fertilizers in the Green Revolution (initiated in Mexico in 1943 and scaled globally by the 1960s) tripled crop yields in developing regions, enabling population support while intensifying land modification through monocultures, irrigation, and chemical inputs.[36] Urbanization accelerated dramatically, with the proportion of the world's population living in cities rising from about 16% in 1900 to nearly 47% by 2000, reflecting the construction of megacities and suburban sprawl.[37] In Europe and North America, industrial hubs like Detroit and Manchester expanded into conurbations supported by steel-frame skyscrapers and mass transit; by 1920, New York City's population exceeded 5 million, emblematic of vertical anthropospheric density.[38] The spread of industrialization to Asia—Japan achieving near-full mechanization by 1930, followed by India's steel mills post-1950 and China's heavy industry boom after 1958—shifted production eastward, with global manufacturing output increasing over 20-fold from 1900 to 1970.[28] These shifts relied on raw material extraction, such as the Middle East's oil fields developed from the 1908 Spindletop gusher onward, fueling anthropospheric mobility and energy demands. Infrastructure networks achieved planetary connectivity, with paved roads expanding from 1 million kilometers globally in 1900 to over 30 million by 2000, dominated by the U.S. Interstate system (initiated 1956) and Europe's Autobahns (1930s).[39] Railways peaked in mileage around 1920 before road dominance, but electrification transformed systems, as in the Soviet Union's Trans-Siberian extensions (completed 1916) and India's network growth to 65,000 kilometers by 1947. Energy systems globalized via hydroelectric dams (e.g., Hoover Dam, 1936) and oil pipelines, with electricity access rising from under 10% worldwide in 1900 to 70% by 1990, underpinning factories, homes, and communications.[40] Aviation's commercialization—from the 1919 first transatlantic flight to 1,000+ global airports by 1950—integrated remote regions into trade webs, while shipping containerization (invented 1956) standardized global logistics, embedding anthropospheric efficiency across continents.[41] This era's expansions, while enabling prosperity—global GDP per capita quadrupled from 1900 to 2000—also homogenized ecosystems through uniform built forms and supply chains, with Western engineering models exported via colonial legacies and postwar aid like the Marshall Plan (1948), which rebuilt Europe's infrastructure and influenced developing-world paradigms.[42] Decolonization post-1945 spurred independent nations to replicate these systems, as in Brazil's highway grids and Africa's rail projects, extending anthropospheric uniformity despite local adaptations. Scholarly analyses attribute this reach to causal chains of technological diffusion and capital flows, rather than uniform ideological drivers, though data from international bodies like the UN underscore empirical correlations with resource throughput increases exceeding population growth rates.Key Components
Built Environments and Settlements
The built environment comprises all human-constructed structures, including residential, commercial, and industrial buildings, as well as the networks of roads, utilities, and public spaces that support them, forming the tangible infrastructure of human habitation within the anthroposphere.[7] Human settlements, as clusters of these structures, vary from dispersed rural homesteads to dense urban agglomerations, reflecting adaptations to local geography, resources, and socioeconomic needs.[6] Globally, built-up areas—defined as impervious surfaces like buildings and pavement—occupy less than 2% of Earth's land surface, yet they accommodate over half of the human population, concentrating activity and resource use in compact zones.[43] Urban settlements dominate contemporary built environments, with cities evolving from ancient trading posts to modern hubs of economic and technological activity. As of 2024, the urban population stands at approximately 4.70 billion people, representing about 56% of the world's total inhabitants, a figure projected to rise toward 68% by 2050 according to United Nations estimates.[44] [45] Megacities, metropolitan areas exceeding 10 million residents, exemplify this concentration; Tokyo holds the record with 37.4 million inhabitants, followed by Delhi and Shanghai, with around 33 such entities worldwide as of recent counts.[46] These settlements often feature high-rise constructions using reinforced concrete and steel, enabling vertical expansion amid land constraints, though they vary by region—European cities emphasize historic stone and brick amid compact cores, while North American ones sprawl with single-family homes and highways.[47] Rural settlements, conversely, include villages, hamlets, and dispersed farmsteads, typically clustered around agricultural lands or extractive sites, comprising lower-density built forms like wooden or adobe structures suited to agrarian lifestyles.[48] These account for the remaining 44% of global population but cover far greater land areas, with built elements integrated into natural landscapes rather than dominating them. Transitional forms, such as suburbs and peri-urban zones, bridge rural and urban divides, often resulting from post-World War II housing booms and automobile-dependent planning, expanding impervious surfaces outward from city centers.[49] Settlement patterns exhibit a hierarchy influenced by historical factors: pre-industrial villages formed nucleated clusters for defense and resource sharing, while industrial-era urbanization spurred linear growth along transport corridors, culminating in today's polycentric megaregions.[50] Empirical mapping via satellite data reveals that built environments have expanded by over 50% since 1990, driven by population growth and migration, though this footprint remains modest relative to agricultural conversion, underscoring settlements' role as high-impact nodes rather than vast territorial consumers.[51]Resource Extraction and Agriculture
Resource extraction encompasses the mining of minerals, fossil fuels, and other raw materials from the Earth's lithosphere, fundamentally altering geological structures to support anthropospheric expansion through construction, manufacturing, and energy production.[6] In 2020, global extraction of metal ores alone reached 9.6 billion tonnes, representing approximately 10% of total material extraction worldwide and enabling the production of infrastructure and goods integral to human settlements.[52] Mining operations, including open-pit and underground methods, have excavated vast areas, with critical minerals like lithium—essential for batteries—primarily sourced from countries such as Australia (50% of global production in 2023), Chile (25%), and China (18%).[53] These activities modify the lithosphere by creating pits, tailings dams, and waste heaps, often leading to localized subsidence, erosion, and soil contamination if not mitigated.[54] Agriculture, as a cornerstone of the anthroposphere, involves the systematic conversion of natural landscapes into managed systems for crop cultivation and livestock grazing, occupying nearly half of the world's habitable land.[55] According to FAO data, agricultural land totaled 4,781 million hectares in 2022, comprising 1,573 million hectares of cropland and 3,208 million hectares of meadows and pastures, with cropland expanding 5% since 2001 while pastures declined 6%.[56] This transformation began with early domestication around 12,000 years ago, shifting from hunter-gatherer patterns to sedentary food production, and has intensified through mechanization, irrigation, and fertilizers, enabling population growth but entailing soil depletion, erosion, and habitat fragmentation.[57] Modern practices, including monoculture and tillage, accelerate lithospheric changes by compacting soils and reducing organic matter, with annual human-induced erosion exceeding natural rates.[58] The interplay between extraction and agriculture amplifies anthropospheric dominance over the lithosphere, as mining provides fertilizers (e.g., phosphate rock) and machinery materials, while agricultural expansion drives demand for cleared land, often overlapping in regions like the Amazon where both activities contribute to deforestation.[7] In 2023, investment in mineral mining grew 10% despite price pressures, underscoring ongoing reliance for agricultural inputs like nitrogen-based fertilizers derived from natural gas extraction.[59] Unmanaged operations in both sectors risk contaminating groundwater and biodiversity loss, though technological advances in precision agriculture and sustainable mining aim to minimize these lithospheric disruptions.[60]Infrastructure and Energy Systems
The anthroposphere's infrastructure comprises human-engineered networks essential for mobility, resource distribution, and habitation support, including transportation systems, utilities, and communication conduits that have scaled with population and industrialization. These elements, such as roads, railways, ports, water supply lines, and electrical grids, physically manifest human modification of the environment, enabling global trade and urbanization.[61][6] Transportation infrastructure forms a foundational layer, with the global road network exceeding 21 million kilometers as of 2023, facilitating vehicular movement across continents.[62] Railway systems total over 1.3 million route-kilometers worldwide, concentrated in regions like Europe and Asia for freight and passenger transport.[63] Ports and maritime facilities underpin approximately 70% of global trade by value, processing billions of tons of cargo annually through expanded terminals and dredging operations.[64] Energy infrastructure integrates generation, transmission, and distribution networks, with global electricity grids spanning roughly 68 million kilometers in 2023, including transmission lines estimated at 4.7 to 7 million circuit-kilometers and distribution lines at 88 to 110 million kilometers.[65][66][67] These systems primarily draw from fossil fuel-based power plants, though hydroelectric dams, nuclear reactors, and intermittent renewables like solar and wind farms contribute variably by region. Primary energy consumption underscores the scale of these systems, reaching a record 620 exajoules globally in 2023, up 2% from the prior year, with fossil fuels dominating at over 80%.[68][69]| Energy Source | Share of Global Primary Energy (%) |
|---|---|
| Oil | 32 |
| Coal | 26 |
| Natural Gas | 23 |
| Other (including renewables and nuclear) | 19 |
