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The average human can not live any longer than three days without water. Many of the world’s fresh water sources are running dry or are being contaminated, particularly in developing nations, leaving many without safe water to drink. Only two and a half percent of the Earth’s water is freshwater, and less than one percent is accessible by humans (not tied up in ice caps). This one percent of the Earth’s water supply is expected to sustain a population of over 7 billion people, each needing 2.6 liters a day to remain fully healthy, plus all of the water required for agriculture and industry. These scenarios will only become more and more prevalent as time moves on and we consume more water. The United Nations has classified our planet as being in the midst of a global “water crisis.” Global water supply and shortages are becoming an incredibly real and serious issue, and planning for the future is key to preventing population decline due to a lack of safe drinking water. Shortages of drinking water lead to wars and serious international conflict for basic human survival needs. One of the most popularly and commonly proposed solutions to this problem is to create seawater desalination plants to remove salt from ocean water to make it safe to drink. These water desalination plants, however, are not a viable option to carry us in to the future due to their potentially harmful impacts and expenses.
Before delving in to what is actually wrong with seawater desalination plants, it is important to establish that there are plenty of alternatives available. One of the best alternatives is to adopt more efficient practices, such as conservation of water, and recycling storm water and grey water (from washing machines and bathrooms...
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...sequences and are far cheaper.
Works Cited
1. Into the Sea: Desalination as Hydro-Social Fix in Spain
Erik Swyngedouw, Annals of the Association of American Geographers, Vol. 103, No. 2, SPECIAL ISSUE: Geographies of Water (March 2013), pp. 261-270
2. “California Water Boards Fact Sheet.” California Water Boards. waterboards.ca.gov, 23 May 2013. Web. 25 Apr. 2014.
3. Desalination in Chennai: What about the Poor and the Environment?
Gregor Meerganz von Medeazza, Economic and Political Weekly, Vol. 41, No. 11, Money, Banking and Finance (Mar. 18-24, 2006), pp. 949-952
4. “Desalination: An Ocean of Problems.”Food and Water Watch 1 (2009): 1-20. Print.
5. Postel, S.L., G.C. Daily and P.R. Ehrlich. 1996. Human appropriation of renewable fresh water. Science 271:785
“Last Call at the Oasis” is a documentary about our world’s water crisis. The film discusses how many large cities in America are getting closer to use up their available water, how many areas across the globe do not have access to drinking water and are forced to drink contaminated water, how water shortages are causing acts of violence and are causing stress to agricultural communities, and a possible solution of using recycle water to stop us from wasting so much water. The film goes around the globe to talk to scientists who are studying contaminated water, people who have become very sick due to this water, and to the agricultural community in Australia where, unfortunately, some farmers have take their own lives due to water shortages.
“How can you buy or sell the sky-the warmth of the land? The idea is strange to us. Yet we do not own the freshness of air or the sparkle of the water. How can you buy them from us? We will decide in our time” (Chief Seattle: 1855). In the Documentary “Flow – for the love of water” it visualizes the global crisis we face on Mother’s Earth as it pertains to the diminishing of fresh water. The Documentary portrays along with the help of experts that this global crises is affecting each and every one of us in today’s society including animals. The film shows us that water is constantly being wasted, polluted, and privatized by big co operations. Prime examples of these greedy companies were mentioned in the film such as Nestle, Thames, Suez, Vivendi, Coca Cola and Pepsi.
Presently, in the USA the California state is starting suffer with water crises. Therefore, the state started planning many desalination plants. There are three current desalination station, and the government is planning more fifteen. Figure 9 shows the desalinations plants in the California state. There are many critics about the desalinization plants.20 Arguments use against the plants are which use huge amounts of energy, and is very danger for the marine life.20 Desalinated water construction costs approximately $2,000 an acre foot.20 In addition, to produce one gallon of drinking water need two gallons of seawater.20 This process consumes about 38 megawatts to remove 100 million gallons of seawater per day.20
"Water Pollution." Current Issues: Macmillan Social Science Library. Detroit: Gale, 2010. Opposing Viewpoints in Context. Web. 5 May 2014.
Desalinating ocean water seems like it would be too costly and impractical but the difference in cost between fresh water and desalinated water is minimal when you look at the benefits that come along with being able to use ocean water. As of 2008, the price of fresh water ranged anywhere from ten to twenty cents per cubic meter and the price of desalinated water ranged from around one to two dollars per cubic meter. At first you see that the cost is nearly ten to twenty times greater for desalinated water but by using desalinated water not only are you conserving fresh water but you could also potentially curb the problem of sea levels
I believe that the desolation of ocean water is obsessive and should not be done. For example the water system is not consistent. Also, the water that they don't use and all of the salt goes back into the water. Lastly, with the fish screen, the eggs will go into it and die and then the repopulation will be affected. This shows that the desalination plant is an awful idea.
Perth has two seawater desalination plants, one is completed in 2006 with a 123,000 m3/d (45 GL/yr) water production powered by a wind farm. The other one is almost double size of first one, which is 100 GL/yr powered by 65 MWe of dedicated renewable energy, which together provide half the city’s needs.
For every water bottle made, non-renewable resources are wasted to produce an unnecessary luxury. For the bottled water that Americans enjoy, seventeen million barrels of oil are used (excluding transportation), which could fuel more than 1.3 million cars for a year. Most water is imported and exported from places that are thousands of miles away, such as Fiji. Although oil is controversial in nature, for every one liter of water produced, three liters are used. The excess water wasted can supply clean water to the world’s poorest countries.
One reason I think they should stop the desalination is that people are wasting 100 gallons of ocean water for only 50 gallons of fresh drinking water. After doing that they will return the leftover water, but it would have twice as much salt when it’s returned to the ocean. When they put the extra salt into the ocean the sea life would not be as healthy and they could die. This hurts the environment a lot and because they are doing this everyday it will start to
Ritter, Lawrence R., Silber, William L., Udell, Gregory F. 2000, Money, banking, and Financial Markets, 10th edn, USA.
Desalination refers to the removal of salt. It is typically used in the context of saline water, particularly seawater. Desalination is an intricate process and there are multiple methods of approaching desalination; however, the most popular technique is reverse osmosis. There are various factors that must be considered when desalinating water, such as pressure and concentration. Desalinating water has been used for many purposes, whether it be providing drinking water for communities, a steady source of water for agricultural irrigation, or a decent quality steam for the pharmaceutical industry. In today’s world, desalination is becoming more widely practiced in a large scale.
Freshwater is quite scarce, but it is even scarcer than one might think: about seventy percent of all freshwater is frozen in the icecaps of Antarctica and Greenland and is unavailable to humans. Most of the remainder is present as soil moisture or lies in deep underground aquifers as groundwater. It is not economically feasible to extract this waster for use as drinking water. This leaves less than one percent of the world’s fresh water that is available to humans. It includes the water found in lakes, reservoirs, groundwater that is shallow enough to be tapped at an affordable cost. These freshwater sources are the only sources that are frequently replenished by rain and snowfall, and therefore are renewable. At the current rates of consumption, however, this supply of fresh water will not last. Pollution and contamination of freshwater sources exacerbate the problem, further reducing the amount of freshwater available for human consumption. Something must be done if humans want to even survive in the near future: the lack of clean drinking water is already the number one cause of disease in the world today. The first step is worldwide awareness of the water crisis: governments and the citizens they govern worldwide need to know about this problem and be actively involved in solving this problem.
Hennigan, Robert D. "Water Pollution." Oxford University Press 19.11 (1969): 976-78. Web. 16 Apr. 2014.
70% of this demand derives from agriculture which shows the influence of water on food supply globally as well as not just drinking water (Sawin “Water Scarcity could overwhelm the Next Generation”). But increasing water use is not just a matter of the greater number of people needing it to drink and eat; it also comes from pollution and misuse of water supplies, by either dumping or runoff of bacteria or chemicals into water. This also “causes other pollutions as well such as soil and air pollution, accelerating wetland damage and human-caused global warming” (Smith and Thomassey 25). According to a UN report, recent estimates suggest that climate change will account for about 20 percent of the increase in global water scarcity in coming decades. One of the main causes of water scarcity is water mismanagement worldwide.
Rogers, Peter. 2008. "Facing the Freshwater CRISIS. (Cover story)." Scientific American 299, no. 2: 46-53. Academic Search Premier, EBSCOhost (accessed November 4, 2010).