|Look up Depletion in Wiktionary, the free dictionary.|
Resource depletion is the consumption of a resource faster than it can be replenished. Natural resources are commonly divided between renewable resources and non-renewable resources (see also mineral resource classification). Use of either of these forms of resources beyond their rate of replacement is considered to be resource depletion.
- Aquifer depletion
- Mining for fossil fuels and minerals
- Overconsumption, excessive or unnecessary use of resources
- Pollution or contamination of resources
- Slash-and-burn agricultural practices, currently occurring in many developing countries
- Soil erosion
- Technological and industrial development
- Increases the greenhouse gases
- Ozone depletion
Minerals are needed to provide food, clothing, and housing. A United States Geological Survey (USGS) study found a significant long-term trend over the 20th century for non-renewable resources such as minerals to supply a greater proportion of the raw material inputs to the non-fuel, non-food sector of the economy; an example is the greater consumption of crushed stone, sand, and gravel used in construction.
Large-scale exploitation of minerals began in the Industrial Revolution around 1760 in England and has grown rapidly ever since. Technological improvements have allowed humans to dig deeper and access lower grades and different types of ore over that time. Virtually all basic industrial metals (copper, iron, bauxite, etc.), as well as rare earth minerals, face production output limitations from time to time, because supply involves large up-front investments and is therefore slow to respond to rapid increases in demand.
Minerals projected by some to enter production decline during the next 20 years:
- Gas (2023)
- Copper (2024). Data from the United States Geological Survey (USGS) suggest that it is very unlikely that copper production will peak before 2040.
- Zinc. Developments in hydrometallurgy have transformed non-sulphide zinc deposits (largely ignored until now) into large low cost reserves.
Minerals projected by some to enter production decline during the present century:
Peak oil is the period when the maximum rate of global petroleum extraction is reached, after which, according to peak oil theory, the rate of production will undergo a long-term decline. The 2005 Hirsch report concluded that the decreased supply combined with increasing demand will significantly increase the worldwide prices of petroleum derived products, and that most significant will be the availability and price of liquid fuel for transportation.
The Hirsch report, funded by United States Department of Energy, concluded that “The peaking of world oil production presents the U. S. and the world with an unprecedented risk management problem. As peaking is approached, liquid fuel prices and price volatility will increase dramatically, and, without timely mitigation, the economic, social, and political costs will be unprecedented. Viable mitigation options exist on both the supply and demand sides, but to have substantial impact, they must be initiated more than a decade in advance of peaking.”
Deforestation is the clearing of forests by cutting or burning of trees and plants in a forested area. As a result of deforestation, presently about one half of the forests that once covered Earth have been destroyed. It occurs for many different reasons, and it has several negative implications on the atmosphere and the quality of the land in and surrounding the forest.
One of the main causes of deforestation is clearing forests for agricultural reasons. As the population of developing areas, especially near rainforests, increases, the need for land for farming becomes more and more important. For most people, a forest has no value when its resources are not being used, so the incentives to deforest these areas outweigh the incentives to preserve the forests. For this reason, the economic value of the forests is very important for the developing countries.
Because deforestation is so extensive, it has made several significant impacts on the environment, including carbon dioxide in the atmosphere, changing the water cycle, an increase in soil erosion, and a decrease in biodiversity. Deforestation is often cited as a cause of global warming. Because trees and plants remove carbon dioxide and emit oxygen into the atmosphere, the reduction of forests contribute to about 12% of anthropogenic carbon dioxide emissions. One of the most pressing issues that deforestation creates is soil erosion. The removal of trees causes higher rates of erosion, increasing risks of landslides, which is a direct threat to many people living close to deforested areas. As forests get destroyed, so does the habitat for millions of animals. It is estimated that 80% of the world’s known biodiversity lives in the rainforests, and the destruction of these rainforests is accelerating extinction at an alarming rate.
The United Nations and the World Bank created programs such as Reducing Emissions from Deforestation and Forest Degradation (REDD), which works especially with developing countries to use subsidies or other incentives to encourage citizens to use the forest in a more sustainable way. In addition to making sure that emissions from deforestation are kept to a minimum, an effort to educate people on sustainability and helping them to focus on the long-term risks is key to the success of these programs. The New York Declaration on Forests and its associated actions promotes reforestation, which is being encouraged in many countries in an attempt to repair the damage that deforestation has done.
Wetlands are ecosystems that are often saturated by enough surface or groundwater to sustain vegetation that is usually adapted to saturated soil conditions, such as cattails, bulrushes, red maples, wild rice, blackberries, cranberries, and peat moss. Because some varieties of wetlands are rich in minerals and nutrients and provide many of the advantages of both land and water environments they contain diverse species and provide a distinct basis for the food chain.
Traditionally, wetlands were assumed to be useless so it was not a large concern when they were being dug up for settlements, agricultural use, etc. It is now believed that the wetland habitats contribute to a environmental health and biodiversity.
In the USA, less than half of the wetlands that still existed in the 1600s have vanished.
Wetlands provide environmental services for:
- Food and habitat
- Improving water quality
- Commercial fishing
- Floodwater reduction
- Shoreline stabilization
Some loss of wetlands resulted from natural causes such as erosion, sedimentation (the buildup of soil by the settling of fine particles over a long period of time), subsidence (the sinking of land because of diminishing underground water supplies), and a rise in the sea level.
Nonnatural causes of wetland degradation and loss include:
- Hydrologic alteration
- Urbanization and urban development
- Industrialization and industrial development
- Silviculture/Timber harvest
- Atmospheric deposition
Water is an essential resource needed to survive everyday life. In fact, we would only be able to last around a week without consuming any water. Even historically, water has had a profound influence on a nation and people's prosperity and success around the world.
As of right now,[when?] groundwater is considered to be a non-renewable resource and it actually serves as ninety-eight percent of all the earth's available fresh water. Groundwater is known to be used to supply things such as wells and aquifers for private, agricultural, and public use. Of all the groundwater covering the entire world, six percent of it is replenished every fifty, or so, years. However, of all the 22.6 million cubic kilometers of groundwater available, only .35 million of it is renewable.
This section may stray from the topic of the article. (July 2017)
The use and depletion of water sources has created turmoil in these nations that have little access to water reserves. A good example of this turmoil can be seen in both the nations of Egypt and Israel. Each nation lives downstream of very important rivers; therefore, it is crucial for both Egypt and Israel that these rivers are not tampered with or that they do not dry up. In fact, both nations have threatened to go to war with the nations residing upstream if they were to dam the rivers and/or cut off their supply of fresh water resources to them.
Migration is another factor of water depletion that is affecting not only the nation which is suffering from the loss of water resources but also nations farther outside their borders as well. People tend to migrate to nations with better environmental regions than their own. This mass movement of people has been causing violence and chaos throughout the world. It has also been met with resistance because places like the United States and Europe do not want migrants coming to their lands and nations.
This section may stray from the topic of the article. (June 2018)
With the decrease of fossil fuels and oil, the issue of renewable energy is coming. The energy transition can help with the problem of decreasing numbers of both fossil fuels and oil. Also, it could solve the problems of the environment that can also be affected. The two main sources of renewable energy are solar power and wind power. Both have advantages and disadvantages. There are other renewable resources that are being used at hand, but are also being depleted little by little and limited as well. The government and scientist are researching and looking upon alternatives to replace the depleting nonrenewable resources.
The sun is one of the main leading sources of renewable energy. Solar power can be harnessed from the solar cells that can be in sizes large and small. Japan and the U.S. are leading in the department of selling and manufacturing solar powered utilities. While people in cities would obtain electricity via solar power plants, there are consumer-friendly alternatives to buy for households. Wind energy is another factor of obtaining renewable energy to generate electricity in many parts of the world where the wind blows often.
- Höök, M.; Bardi, U.; Feng, L.; Pang., X. (2010). "Development of oil formation theories and their importance for peak oil". Marine and Petroleum Geology. 27 (9). doi:10.1016/j.marpetgeo.2010.06.005.
- Depletion and Conservation of Natural Resources: The Economic Value of the World's Ecosystems — How Much is Nature Worth? The Role of Forests and Habitat
- Dirzo, Rodolfo; Hillary S. Young; Mauro Galetti; Gerardo Ceballos; Nick J. B. Isaac; Ben Collen (2014). "Defaunation in the Anthropocene" (PDF). Science. 345 (6195): 401–406. doi:10.1126/science.1251817.
- Materials Flow and Sustainability, US Geological Survey.Fact Sheet FS-068-98, June 1998.
- West, J (2011). "Decreasing metal ore grades: are they really being driven by the depletion of high-grade deposits?". J Ind Ecol. 15 (2): 165–168. doi:10.1111/j.1530-9290.2011.00334.x.
- Drielsma, Johannes A; Russell-Vaccari, Andrea J; Drnek, Thomas; Brady, Tom; Weihed, Pär; Mistry, Mark; Perez Simbor, Laia (2016). "Mineral resources in life cycle impact assessment—defining the path forward". Int J Life Cycle Assess. 21 (1): 85–105. doi:10.1007/s11367-015-0991-7.
- Meinert, Lawrence D; Robinson, Gilpin R Jr; Nassar, Nedal T (2016). "Mineral Resources: Reserves, Peak Production and the Future". resources. 5 (14). doi:10.3390/resources5010014.
- Klare, M. T. (2012). The Race for What’s Left. Metropolitan Books. ISBN 9781250023971.
- Valero & Valero(2010)による『Physical geonomics: Combining the exergy and Hubbert peak analysis for predicting mineral resources depletion』から
- Valero, Alicia; Valero, Antonio (2010). "Physical geonomics: Combining the exergy and Hubbert peak analysis for predicting mineral resources depletion". Resources, Conservation and Recycling. 54: 1074–1083. doi:10.1016/j.resconrec.2010.02.010.
- Zinc Depletion
- Jenkin, G. R. T.; Lusty, P. A. J.; McDonald, I; Smith, M. P.; Boyce, A. J.; Wilkinson, J. J. (2014). Ore Deposits in an Evolving Earth. London: Geological Society, London, Special Publications.
- Hitzman, M. W.; Reynolds, N. A.; Sangster, D. F.; Allen, C. R.; Carman, C. F. (2003). "Classification, genesis, and exploration guides for Nonsulfide Zinc deposits". Economic Geology. 98: 685–714. doi:10.2113/gsecongeo.98.4.685.
- DOE Hirsch Report
- "Global Deforestation". Global Change Curriculum. University of Michigan Global Change Program. January 4, 2006
- Butler, Rhett A. "Impact of Population and Poverty on Rainforests". Mongabay.com / A Place Out of Time: Tropical Rainforests and the Perils They Face. Retrieved May 13, 2009.
- Pearce, David W (2001). "The Economic Value of Forest Ecosystems". Ecosystem Health. 7 (4): 284–296. doi:10.1046/j.1526-0992.2001.01037.x.
- G. R. van der Werf, D. C. Morton, R. S. DeFries, J. G. J. Olivier, P. S. Kasibhatla, R. B. Jackson, G. J. Collatz and J .T. Randerson, CO2 emissions from forest loss, Nature Geoscience, Volume 2 (November 2009) pp. 737–738
- Do We Have Enough Forests? By Sten Nilsson
- "Copenhagen Accord of 18 December 2009". UNFCC. 2009. Retrieved 2009-12-28.
- Diamond, Jared Collapse: How Societies Choose To Fail or Succeed; Viking Press 2004, pages 301–302
- Foley, Jonathan A; DeFries, Ruth; Asner, Gregory P; Barford, Carol; et al. (2005). "Global Consequences of Land Use". Science. 309 (5734): 570–574. doi:10.1126/science.1111772. PMID 16040698.
- "Major Causes of Wetland Loss and Degradation". NCSU. Retrieved 2016-12-11.
- Packer, Randall K. "How Long Can the Average Person Survive Without Water?". Scientific American.
- Peterson, Erik; Posner, Rachel (January 2010). "The World's Water Challenge". Current History.
- Chung, Emily. "Most Groundwater is Effectively a Non-renewable Resource, Study FInds". CBC News.
- Mullen, Kimberly. "Information on Earth's Water". NGWA.
- Klare, Michael (November 2007). "Global Warming Battlefields: How Climate Change Threatens Security". Current History.
- Brown, Lester R.; Larsen, Janet; Roney, J. Matthew; Adams, Emily E. (2015). The Great Transition. New York, N.Y.: W.W. Norton & Company. p. 67. ISBN 978-0-393-35055-5.
- Grandin, Greg, "The Death Cult of Trumpism: In his appeals to a racist and nationalist chauvinism, Trump leverages tribal resentment against an emerging manifest common destiny", The Nation, 29 Jan./5 Feb. 2018, pp. 20–22. "[T]he ongoing effects of the ruinous 2003 war in Iraq and the 2007–8 financial meltdown are... two indicators that the promise of endless growth can no longer help organize people's aspirations... We are entering the second 'lost decade' of what Larry Summers calls 'secular stagnation,' and soon we'll be in the third decade of a war that Senator Lindsey Graham... says will never end. [T]here is a realization that the world is fragile and that we are trapped in an economic system that is well past sustainable or justifiable.... In a nation like the United States, founded on a mythical belief in a kind of species immunity—less an American exceptionalism than exemptionism, an insistence that the nation was exempt from nature, society, history, even death—the realization that it can't go on forever is traumatic." (p. 21.)