Fresh water comes to be the biggest problem in the world. Many countries do not have enough fresh water to survival in the world, such as China and India. Those countries, however, are focusing on lack of water problem and raising fund to find the cause. To solve lack of water problem, major countries are using 3 methods to do it. First way is distillation from sea water. Second way is reducing the pollution of the fresh water. Third way is the elevation of utilization of water resources. Even some conservation efforts have been done in numerous countries in order to deal with waste-water problem, the notion of water sustainability in a broad sense has not been seriously examined. (Water in a changing world, 2009)Childhood diarrhea is closely associated with insufficient water supply, inadequate sanitation, water contaminated with communicable disease agents, and poor hygiene practices. In Diarrhea is estimated to cause 1.5 million children die per year, constituting about 15% of total children deaths under five in developing countries. When people lack of water, usually they get thirsty. Minor dehydration can cause headaches, dizziness and tiredness. Chronic dehydration can harm your kidneys and liver and cause constipation. Prolonged dehydration can lead to low blood pressure, rapid heart-rate, loss of vision, seizures and loss of consciousness, and even worse, to death (What happens if your body is lacking water? N.D.).In Africa, lack of water is the majorly reason of poverty. Nearly one billion people do not have access to clean and safe water. That’s the equivalent of 1 in 8 people on the planet. For these people, poverty is a fact of life. But the good thing is this is a solvable problem.     The first solution is creating more declinator to help the countries which have not enough fresh water. Distillation from sea water is a high cost solution. Saline water can make fresh water because people cannot drink sea water. The process is called desalination, and it is being used more and more around the world to provide people with needed fresh water. In nature, this is a basic process responsible for the hydrologic cycle. The sun causes water to evaporate from sea, the water vapor from the cloud and rain down. This process can be imitated artificially, and more rapidly than in nature, using alternative sources of heating and cooling. Usually this is a solution for developed countries because the average cost to produce 1 acre-foot of desalinated water from seawater ranges is approximately 0 to ,400(Water Desalination: Freshwater from the Sea, N.D.) Right now, the most important users of desalinated water are in the Middle East, which uses about 70%, and America uses 6.5% of capacity. 2nd way is reduce the pollution of the fresh water. Many countries have a lot of lack and steams but they still have problem. Polluted water is unsafe to drink, so it causes many sicknesses and the death of natural. Polluted rivers and lakes are unsuitable for swimming or fishing. Like New York City, people pumped a half billion gallons of raw sewage into the harbor every day. As pollution levels grew, Lake Erie will disappear.(Water Pollution: Freshwater, N.D.). In U.S. the government spend more than billions of dollars to build and upgrade sewage treatment facilities since 1972.  By 2000, some 75 percent of toxic discharges, including heavy metals were being prevented.     3rd solution is increate the utilization of water resources. This is the most economical solution that can use in every country. “The Ministry of Water and Energy stressed the need to improve utilization of water resources in the country,” said by KebedeGerba in Ethiopia. (Addis Ababa, 2011). Although Ethiopia has rich water resources high variability in distribution of water resources both in time and place, they still need to improve the utilization of water. Such as plating and irrigation, any method of irrigation that minimizes evaporation is likely to increase the efficiency of water utilization by the crop. Also, leaks will be costly, even it is in the everyday life or irrigation. A leak of only one drop per second wastes about 9000 liters of water per year, or equivalent of 16 baths every month. Most leaks are easy to find and fix at very little cost. For new house, the water heater tip that could save much money: Bigger is not usually better.     Lack of fresh water affects our life right now. Many people died because of drinking dirty water or dehydration. In these solutions, 1st way is good for rich countries with a small amount of water resources, such as Middle East. 2nd way is helpful for industrialization countries, because they have long term industrial development. Last but not least, every countries can use 3rd one, every people could save water wherever they are living.