Without food of people about forty days, can do without water – no more than five therefore it is necessary to try to save it from disappearance. Now on the planet the sharp exhaustion of water resources is observed that can ruin not only people and animals, but also all earth. Scientists discussed about it more than once, and the majority inclines to opinion that reviver, both fresh, and salty, becomes less.
Instruction
1. There is such concept as water cycle of the nature and from it follows that liquid at all does not disappear anywhere, and just changes the state for gaseous. At first there is an evaporation, then condensation, and then it returns to the earth in the form of precipitation, such as rain, snow, hail. Thus, water, disappearing, disappears only for a while and is the filled resource, but also this statement cannot be considered true.
2. About 97% of a water stock make the seas and oceans, and only 3% of fresh resources. Sea water is not suitable for drink owing to the high content of the salts dissolved in it therefore its use can have pernicious effect on health. Considering these figures, it should be noted that liquid, suitable for activity of the person, absolutely small quantity which can not always differ in excellent quality.
3. Ecological situation on the planet worsens every year and the people trying not to adapt to the nature are guilty of it, and in every possible way to enslave it, doing it irreparable harm. The quality of drinking water falls: the rivers, lakes, reservoirs are similar to one big dump, in them are dumped a huge number of drains which are difficult for cleaning even with the most modern technologies. It is quite difficult to solve this problem at the legislative level, it is almost impossible to achieve respect for all norms and health regulations, and it is difficult to call each person to order therefore at the moment the situation leaves much to be desired.
4. In some countries the problem of shortage of drinking stocks is solved with the help of installation of systems for desalting of sea water or its desalting, turning salty liquid into distillate. This procedure rather expensive, but in the circumstances the person is forced to resort even to the most radical measures to make the life safe and comfortable. Though the constant use of the distilled water does not improve health, and even on the contrary, but for some and it is an excellent alternative of reviver.
5. If referred global warming of people to the category of myths earlier, then the current situation and increase in average air temperature can be regarded as a warning of the future drought. In recent years in headline news information on lack of precipitation which leads to death of a harvest and devastation of many hectares of once fertile soil more often sounds. For fight against this natural phenomenon very many ways are thought up, but any of them will not be effective exactly till that time until the person begins to remove the cause and to try to increase a stock of water resources on the planet.