water since ancient times has been for a man not just a means of quenching thirst, but also a source of life.Ancient tribes settled along the banks of rivers, because they gave them food, the ability to grow regular crops and escape from the sweltering summer heat.But the water resources of the world every year inevitably reduced, and to maintain a normal life on our planet, mankind has to exert more effort.
of these problems contributes not only to the deteriorating environmental situation, in particular the greenhouse effect, which leads to the gradual evaporation of water from the surface of the planet, but also the growth of the world population.The uneven distribution of water in the territory of continents and islands leads to water shortages in individual countries.Especially brightly it is expressed in such countries as Kuwait, Libya, Oman, UAE and some countries in Central Africa.
Major World water resources are concentrated in Brazil, Russia, the United States and Canada.But it is worth noting that on the territory of the above countries, they are distributed so unevenly that some part of the population is still a shortage of water.So, for example, such major US cities such as Los Angeles and New York are often robbed of their water from farmers, whose lands are located close to these cities.
world's water resources are concentrated not only in rivers, freshwater lakes and reservoirs.The largest water reserves - a centuries-old ice cap covering the poles of our planet.It is due to the gradual melting of these glaciers are regularly replenished stocks of water in the world.But in recent years, researchers have North and South Poles are increasingly talking about the fact that the acceleration of the melting lead to a steady reduction of drinking water on the planet, which may in the future face of this disaster.
To save the world's water resources and to prevent their sharp decline, the international community annually develops special programs for the protection of the environment, reduce the harm caused by the greenhouse effect, and the purification of water used in industry.
Another current problem with water reserves of our planet - it is their permanent pollution.Often, especially in underdeveloped countries, sewage is cleaned and mixed with clean water intended for domestic use.As a result, the number of really suitable for human water is reduced, as well as develop all kinds of diseases.
Water Earth require very careful to be treated, so ecologists most countries are paying a huge amount of time, the problems of the construction of water treatment plants in the industry.
gradual drying up of rivers and lakes, especially in Africa and South Asia, after several decades threatens ecological disaster in these regions.Scientists predict already in 2025 the water resources of the world will be reduced so that about three billion people in the world live on the verge of "water crisis".To prevent such a situation right now should be to make water consumption more sustainable, and to build rainwater collection system, experts say.
Also, there is a gradual development of this relatively new branch of the economy, as the desalination of sea water.Countries with increased water scarcity, such as Kuwait, pay great attention to this issue and develop a new station for water desalination.Today water has become even trafficked - some countries buy clean water from the States on whose territory the moisture reserves are much higher.
