Water supply

The global shortage of fresh water has emerged as a critical challenge, with 2.3 billion people, or one in four individuals worldwide, facing water scarcity, according to the United Nations.

Every ninth inhabitant of the planet does not have access to clean water near their home. And the situation is constantly getting worse. According to UN estimates, 9.8 billion people will live on Earth by 2050.

More recently, water, like air, was considered one of the most accessible, and besides, free natural resources. Today, you have to pay for water, although in some countries water is still very cheap.

The internal renewable water resources of rivers and aquifers amount to 44,000 km3/year, and the volume of water intake (in all sectors) exceeds 4,000 km3/year, which is almost 10%.