Nowadays there are various techniques for desalination. Some pass waters with high pressure through microscopic membranes, so microscopic that even viruses cannot pass through its holes, Salt molecules are separated from water and the result is sweet water (the amount of sweetening depends on our choice). In another type of desalination, saltwater is evaporated and then it cools again, so sweat water remains. It is exactly the thing which distillation devices do. It is not important what and how these devices operate. What matters is the thing remains of these devices. Sweet water is the most important part remains; this is the philosophy of the existence of these devices. Except for sweet water, bitter water is abided too. The bitter water is hot, distasteful and bad scenery. This water is much warmer than normal seawater and its other salts (such as salt and other minerals) are higher than the salinity of the sea. So what should we do with this bitter water. The simplest answer is to find a way to its source or sea. Usually, desalination is placed near the sea. They receive water with pressure and soften the water there, then they give it back to the sea. In this process, many samples of environmental degradation occur which we cannot escape with the available level of technology. The desalination is forced to squeeze the water into their inner layers. Many microscopic organisms in the seas (such as planktons) and even small crustaceans or tiny fish cannot withstand this extreme pressure and water poisoning, and they cannot resist then they go to desalination and disappear. Once this becomes more serious, we know that most of these microscopic beings are the beginning of the sea's life chain, and without them, aquatic life is in danger of being completely destroyed.