Since the last decade of the twentieth century freshwater scarcity has viewed as a global threat. As the world's population grew, water consumption increased, as well as freshwater scarcity, which led to the worsening of living conditions in the majority of developing countries.
The world’s population is growing rapidly, simultaneously the need for fresh drinking water increases.
According to the World Population Clock (http://countrymeters.info/) Earth's population has reached approximately 7,289 billion people in 2015 and the annual growth rate runs up to 83 million people.
These figures indicate the annual growth of fresh water necessity in volume of 64 000 000m3.
While the world's population has increased 3 times, fresh water usage has increased by 17 times. Moreover, according to some forecasts, within 20 years it can grow by 3 times.
Under these circumstances, every sixth man on the planet is experiencing a lack of fresh drinking water. Urbanization processes, population growth, industrial water demand, and climate change lead to desertification and water scarcity, and the situation will get worse. The lack of water may soon lead to the spreading and aggravation of existing global problems.
When the freshwater scarcity will pass a certain mark, and humanity will finally realize the real value of fresh water resources, we can expect the evolving of political instability, intensification of armed conflicts and the further spreading of global problems affecting world’s economies.
Water distribution on Earth is extremely uneven. This fact puts different countries in unequal conditions ab initio, not only in terms of non-renewable resources procurement, but also in terms of quality of life and survival ability.
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