Physics:Non-renewable resource

From HandWiki
Revision as of 23:35, 15 March 2024 by Wikisleeper (talk | contribs) (simplify)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Short description: Class of natural resources
A coal mine in Wyoming, United States. Coal, produced over millions of years, is a finite and non-renewable resource on a human time scale.

A non-renewable resource (also called a finite resource) is a natural resource that cannot be readily replaced by natural means at a pace quick enough to keep up with consumption.[1] An example is carbon-based fossil fuels. The original organic matter, with the aid of heat and pressure, becomes a fuel such as oil or gas. Earth minerals and metal ores, fossil fuels (coal, petroleum, natural gas) and groundwater in certain aquifers are all considered non-renewable resources, though individual elements are always conserved (except in nuclear reactions, nuclear decay or atmospheric escape).

Conversely, resources such as timber (when harvested sustainably) and wind (used to power energy conversion systems) are considered renewable resources, largely because their localized replenishment can occur within time frames meaningful to humans as well.

Earth minerals and metal ores

Main pages: Earth:Mineral and Earth:Ore
Raw gold ore that is eventually smelted down into gold metal

Earth minerals and metal ores are examples of non-renewable resources. The metals themselves are present in vast amounts in Earth's crust, and their extraction by humans only occurs where they are concentrated by natural geological processes (such as heat, pressure, organic activity, weathering and other processes) enough to become economically viable to extract. These processes generally take from tens of thousands to millions of years, through plate tectonics, tectonic subsidence and crustal recycling.

The localized deposits of metal ores near the surface which can be extracted economically by humans are non-renewable in human time-frames. There are certain rare earth minerals and elements that are more scarce and exhaustible than others. These are in high demand in manufacturing, particularly for the electronics industry.

Fossil fuels

Natural resources such as coal, petroleum(crude oil) and natural gas take thousands of years to form naturally and cannot be replaced as fast as they are being consumed. Eventually it is considered that fossil-based resources will become too costly to harvest and humanity will need to shift its reliance to other sources of energy such as solar or wind power, see renewable energy.

An alternative hypothesis is that carbon based fuel is virtually inexhaustible in human terms, if one includes all sources of carbon-based energy such as methane hydrates on the sea floor, which are vastly greater than all other carbon based fossil fuel resources combined.[2] These sources of carbon are also considered non-renewable, although their rate of formation/replenishment on the sea floor is not known. However their extraction at economically viable costs and rates has yet to be determined.

At present, the main energy source used by humans is non-renewable fossil fuels. Since the dawn of internal combustion engine technologies in the 19th century, petroleum and other fossil fuels have remained in continual demand. As a result, conventional infrastructure and transport systems, which are fitted to combustion engines, remain prominent throughout the globe.

The modern-day fossil fuel economy is widely criticized for its lack of renewability, as well as being a contributor to climate change.[3]

Nuclear fuels

Rössing uranium mine is the longest-running and one of the largest open pit uranium mines in the world, in 2005 it produced eight percent of global uranium oxide needs (3,711 tons).[4] The most productive mines however are the underground McArthur River uranium mine in Canada which produces 13% of the world's uranium, and the similarly underground poly-metallic Olympic Dam mine in Australia, which despite being largely a copper mine, contains the largest known reserve of uranium ore.
Annual release of "technologically enhanced"/concentrated Naturally occurring radioactive material, uranium and thorium radioisotopes naturally found in coal and concentrated in heavy/bottom coal ash and airborne fly ash.[5] As predicted by ORNL to cumulatively amount to 2.9 million tons over the 1937–2040 period, from the combustion of an estimated 637 billion tons of coal worldwide.[6] This 2.9 million tons of actinide fuel, a resource derived from coal ash, would be classified as low grade uranium ore if it occurred naturally.
Main page: Physics:Nuclear fuel
Further information: Physics:Nuclear power proposed as renewable energy and Physics:Peak uranium

In 1987, the World Commission on Environment and Development (WCED) classified fission reactors that produce more fissile nuclear fuel than they consume (i.e. breeder reactors) among conventional renewable energy sources, such as solar and falling water.[7] The American Petroleum Institute likewise does not consider conventional nuclear fission as renewable, but rather that breeder reactor nuclear power fuel is considered renewable and sustainable, noting that radioactive waste from used spent fuel rods remains radioactive and so has to be very carefully stored for several hundred years.[8] With the careful monitoring of radioactive waste products also being required upon the use of other renewable energy sources, such as geothermal energy.[9]

The use of nuclear technology relying on fission requires Naturally occurring radioactive material as fuel. Uranium, the most common fission fuel, is present in the ground at relatively low concentrations and mined in 19 countries.[10] This mined uranium is used to fuel energy-generating nuclear reactors with fissionable uranium-235 which generates heat that is ultimately used to power turbines to generate electricity.[11]

As of 2013 only a few kilograms (picture available) of uranium have been extracted from the ocean in pilot programs and it is also believed that the uranium extracted on an industrial scale from the seawater would constantly be replenished from uranium leached from the ocean floor, maintaining the seawater concentration at a stable level.[12] In 2014, with the advances made in the efficiency of seawater uranium extraction, a paper in the journal of Marine Science & Engineering suggests that with, light water reactors as its target, the process would be economically competitive if implemented on a large scale.[13]

Nuclear power provides about 6% of the world's energy and 13–14% of the world's electricity.[14] Nuclear energy production is associated with potentially dangerous radioactive contamination as it relies upon unstable elements. In particular, nuclear power facilities produce about 200,000 metric tons of low and intermediate level waste (LILW) and 10,000 metric tons of high level waste (HLW) (including spent fuel designated as waste) each year worldwide.[15]

Issues entirely separate from the question of the sustainability of nuclear fuel, relate to the use of nuclear fuel and the high-level radioactive waste the nuclear industry generates that if not properly contained, is highly hazardous to people and wildlife. The United Nations (UNSCEAR) estimated in 2008 that average annual human radiation exposure includes 0.01 millisievert (mSv) from the legacy of past atmospheric nuclear testing plus the Chernobyl disaster and the nuclear fuel cycle, along with 2.0 mSv from natural radioisotopes and 0.4 mSv from cosmic rays; all exposures vary by location.[16] Natural uranium in some inefficient reactor nuclear fuel cycles becomes part of the nuclear waste "once through" stream, and in a similar manner to the scenario were this uranium remained naturally in the ground, this uranium emits various forms of radiation in a decay chain that has a half-life of about 4.5 billion years,[17] the storage of this unused uranium and the accompanying fission reaction products have raised public concerns about risks of leaks and containment, however the knowledge gained from studying the natural nuclear fission reactor in Oklo Gabon, has informed geologists on the proven processes that kept the waste from this 2 billion year old natural nuclear reactor that operated for hundreds of thousands of years.[18]

Land surface

Land surface can be considered both renewable and non-renewable resource depending on the scope of comparison. Land can be reused but new land cannot be created on demand so from economic perspective it's a fixed resource with perfectly inelastic supply.[19][20]

Renewable resources

Further information: Engineering:Renewable energy and Physics:Recycling
The Three Gorges Dam, the largest renewable energy generating station in the world.

Natural resources, known as renewable resources, are replaced by natural processes and forces persistent in the natural environment. There are intermittent and reoccurring renewables, and recyclable materials, which are utilized during a cycle across a certain amount of time, and can be harnessed for any number of cycles.

The production of goods and services by manufacturing products in economic systems creates many types of waste during production and after the consumer has made use of it. The material is then either incinerated, buried in a landfill or recycled for reuse. Recycling turns materials of value that would otherwise become waste into valuable resources again.

Satellite map showing areas flooded by the Three Gorges reservoir. Compare 7 November 2006 (above) with 17 April 1987 (below). The energy station required the flooding of archaeological and cultural sites and displaced some 1.3 million people, and is causing significant ecological changes, including an increased risk of landslides.[21] The dam has been a controversial topic both domestically and abroad.[22]

In the natural environment water, forests, plants and animals are all renewable resources, as long as they are adequately monitored, protected and conserved. Sustainable agriculture is the cultivation of plant and animal materials in a manner that preserves plant and animal ecosystems and that can improve soil health and soil fertility over the long term. The overfishing of the oceans is one example of where an industry practice or method can threaten an ecosystem, endanger species and possibly even determine whether or not a fishery is sustainable for use by humans. An unregulated industry practice or method can lead to a complete resource depletion.[23]

The renewable energy from the sun, wind, wave, biomass and geothermal energies are based on renewable resources. Renewable resources such as the movement of water (hydropower, tidal power and wave power), wind and radiant energy from geothermal heat (used for geothermal power) and solar energy (used for solar power) are practically infinite and cannot be depleted, unlike their non-renewable counterparts, which are likely to run out if not used sparingly.

The potential wave energy on coastlines can provide 1/5 of world demand. Hydroelectric power can supply 1/3 of our total energy global needs. Geothermal energy can provide 1.5 more times the energy we need. There is enough wind to power the planet 30 times over, wind power could power all of humanity's needs alone. Solar currently supplies only 0.1% of our world energy needs, but there is enough out there to power humanity's needs 4,000 times over, the entire global projected energy demand by 2050.[24][25]

Renewable energy and energy efficiency are no longer niche sectors that are promoted only by governments and environmentalists. The increasing levels of investment and that more of the capital is from conventional financial actors, both suggest that sustainable energy has become mainstream and the future of energy production, as non-renewable resources decline. This is reinforced by climate change concerns, nuclear dangers and accumulating radioactive waste, high oil prices, peak oil and increasing government support for renewable energy. These factors are commercializing renewable energy, enlarging the market and growing demand, the adoption of new products to replace obsolete technology and the conversion of existing infrastructure to a renewable standard.[26]

Economic models

In economics, a non-renewable resource is defined as goods, where greater consumption today implies less consumption tomorrow.[27] David Ricardo in his early works analysed the pricing of exhaustible resources, where he argued that the price of a mineral resource should increase over time. He argued that the spot price is always determined by the mine with the highest cost of extraction, and mine owners with lower extraction costs benefit from a differential rent. The first model is defined by Hotelling's rule, which is a 1931 economic model of non-renewable resource management by Harold Hotelling. It shows that efficient exploitation of a nonrenewable and nonaugmentable resource would, under otherwise stable conditions, lead to a depletion of the resource. The rule states that this would lead to a net price or "Hotelling rent" for it that rose annually at a rate equal to the rate of interest, reflecting the increasing scarcity of the resources.[28] The Hartwick's rule provides an important result about the sustainability of welfare in an economy that uses non-renewable source.[29]

See also


References

  1. ↑ Earth systems and environmental sciences.. [Place of publication not identified]: Elsevier. 2013. ISBN 978-0-12-409548-9. OCLC 846463785. 
  2. ↑ "Methane hydrates". http://worldoceanreview.com/en/wor-1/energy/methane-hydrates/. 
  3. ↑ America's Climate Choices: Panel on Advancing the Science of Climate Change; National Research Council (2010). Advancing the Science of Climate Change. Washington, D.C.: The National Academies Press. doi:10.17226/12782. ISBN 978-0-309-14588-6. http://www.nap.edu/catalog.php?record_id=12782. 
  4. ↑ Rössing (from infomine.com, status Friday 30 September 2005)
  5. ↑ "Radioactive Elements in Coal and Fly Ash: Abundance, Forms, and Environmental Significance". U.S. Geological Survey Fact Sheet FS-163-97. October 1997. http://pubs.usgs.gov/fs/1997/fs163-97/FS-163-97.pdf. 
  6. ↑ "Coal Combustion – ORNL Review Vol. 26, No. 3&4, 1993". http://www.ornl.gov/info/ornlreview/rev26-34/text/colmain.html. 
  7. ↑ Brundtland, Gro Harlem (20 March 1987). "Chapter 7: Energy: Choices for Environment and Development". Our Common Future: Report of the World Commission on Environment and Development. Oslo. http://www.un-documents.net/ocf-07.htm. "Today's primary sources of energy are mainly non-renewable: natural gas, oil, coal, peat, and conventional nuclear power. There are also renewable sources, including wood, plants, dung, falling water, geothermal sources, solar, tidal, wind, and wave energy, as well as human and animal muscle-power. Nuclear reactors that produce their own fuel ("breeders") and eventually fusion reactors are also in this category" 
  8. ↑ American Petroleum Institute. "Key Characteristics of Nonrenewable Resources". http://www.api.org/classroom/curricula/nonrenew-resources.cfm. 
  9. ↑ http://www.epa.gov/radiation/tenorm/geothermal.html Geothermal Energy Production Waste.
  10. ↑ "World Uranium Mining". World Nuclear Association. http://www.world-nuclear.org/info/inf23.html. 
  11. ↑ "What is uranium? How does it work?". World Nuclear Association. http://www.world-nuclear.org/education/uran.html. 
  12. ↑ "The current state of promising research into extraction of uranium from seawater – Utilization of Japan's plentiful seas: Global Energy Policy Research". http://www.gepr.org/en/contents/20130729-01/. 
  13. ↑ Gill, Gary; Long, Wen; Khangaonkar, Tarang; Wang, Taiping (22 March 2014). "Development of a Kelp-Type Structure Module in a Coastal Ocean Model to Assess the Hydrodynamic Impact of Seawater Uranium Extraction Technology". Journal of Marine Science and Engineering 2 (1): 81–92. doi:10.3390/jmse2010081. 
  14. ↑ World Nuclear Association. Another drop in nuclear generation World Nuclear News, 5 May 2010.
  15. ↑ "Factsheets & FAQs". International Atomic Energy Agency (IAEA). http://www.iaea.org/Publications/Factsheets/English/manradwa.html. 
  16. ↑ United Nations Scientific Committee on the Effects of Atomic Radiation. Sources and Effects of Ionizing Radiation, UNSCEAR 2008
  17. ↑ Mcclain, D.E.; A.C. Miller (20 December 2007). "Status of Health Concerns about Military Use of Depleted Uranium and Surrogate Metals in Armor-Penetrating Munitions". NATO. http://www.afrri.usuhs.mil/www/outreach/pdf/mcclain_NATO_2005.pdf. 
  18. ↑ AJ González (2000). "The Safety of Radioactive Waste Management". IAEA. https://www.iaea.org/sites/default/files/publications/magazines/bulletin/bull42-3/42302680518.pdf. 
  19. ↑ J.Singh (2014-04-17). "Land: Meaning, Significance, Land as Renewable and Non-Renewal Resource" (in en-US). https://www.economicsdiscussion.net/factors-of-production/land-meaning-significance-land-as-renewable-and-non-renewal-resource/785. 
  20. ↑ Lambin, Eric F. (2012-12-01). "Global land availability: Malthus versus Ricardo" (in en). Global Food Security 1 (2): 83–87. doi:10.1016/j.gfs.2012.11.002. ISSN 2211-9124. http://www.sciencedirect.com/science/article/pii/S2211912412000235. 
  21. ↑ "重庆云阳长江右岸现360万方滑坡险情-地方-人民网". People's Daily. http://unn.people.com.cn/GB/9105724.html.  See also: "探访三峡库区云阳故陵滑坡险情". News.xinhuanet.com. http://news.xinhuanet.com/newscenter/2009-04/09/content_11157017.htm. 
  22. ↑ Lin Yang (2007-10-12). "China's Three Gorges Dam Under Fire". Time. http://www.time.com/time/world/article/0,8599,1671000,00.html. Retrieved 2009-03-28. "The giant Three Gorges Dam across China's Yangtze River has been mired in controversy ever since it was first proposed".  See also: Laris, Michael (1998-08-17). "Untamed Waterways Kill Thousands Yearly". The Washington Post. https://www.washingtonpost.com/wp-srv/inatl/longterm/china/stories/death081798.htm. "Officials now use the deadly history of the Yangtze, China's longest river, to justify the country's riskiest and most controversial infrastructure project – the enormous Three Gorges Dam."  and Grant, Stan (2005-06-18). "Global Challenges: Ecological and Technological Advances Around the World". CNN. http://edition.cnn.com/TRANSCRIPTS/0506/18/gc.01.html. "China's engineering marvel is unleashing a torrent of criticism. [...] When it comes to global challenges, few are greater or more controversial than the construction of the massive Three Gorges Dam in Central China."  and Gerin, Roseanne (2008-12-11). "Rolling on a River". Beijing Review. http://www.bjreview.com.cn/eye/txt/2008-12/06/content_168792.htm. "..the 180-billion yuan ($26.3 billion) Three Gorges Dam project has been highly contentious." 
  23. ↑ "Illegal, Unreported and Unregulated Fishing in Small-Scale Marine and Inland Capture Fisharies". Food and Agriculture Organization. http://www.fao.org/DOCREP/005/Y3274E/y3274e09.htm. 
  24. ↑ R. Eisenberg and D. Nocera, "Preface: Overview of the Forum on Solar and Renewable Energy," Inorg. Chem. 44, 6799 (2007).
  25. ↑ P. V. Kamat, "Meeting the Clean Energy Demand: Nanostructure Architectures for Solar Energy Conversion," J. Phys. Chem. C 111, 2834 (2007).
  26. ↑ "Global Trends in Sustainable Energy Investment 2007: Analysis of Trends and Issues in the Financing of Renewable Energy and Energy Efficiency in OECD and Developing Countries (PDF), p. 3.". United Nations Environment Programme. http://energy-base.org/wp-content/uploads/2013/11/SEFI-Global-Trends-in-Sustainable-Energy-Investment-2007.pdf. 
  27. ↑ Cremer and Salehi-Isfahani 1991:18
  28. ↑ Hotelling, H. (1931). "The Economics of Exhaustible Resources". J. Political Econ. 39 (2): 137–175. doi:10.1086/254195. 
  29. ↑ Hartwick, John M. (December 1977). "Intergenerational Equity and the Investing of Rents from Exhaustible Resources". The American Economic Review 67 (5): 972–974. https://www.jstor.org/stable/1828079. 

it:Energie non rinnovabili



Retrieved from "https://handwiki.org/wiki/index.php?title=Physics:Non-renewable_resource&oldid=3718061"