Blue Gold

Water is indispensable for our survival and its presence is strongly linked to the well-being of our society. A percentage to keep in mind is 0.065% which represents the quantity of available water on our planet. The rest is found in the sea, in the form of ice or in inaccessible areas. And remember that in many parts of the world, there is a shortage of water, which can even become a cause of conflict. In addition to this, there is pollution, which can contaminate fresh water reserves. It is, therefore, of the utmost necessity to preserve this precious asset. For example, all water utility companies must regularly repair or prevent leakage by means of careful maintenance and by treating the resources so as to safeguard our health and the environment.

Solution
1. On average, about 150 litres; 2. 97%; 3. On average, the water available to someone living in the United States is 425 litres a day; 4. Up to 80 litres; 5. 10 litres, but consumption can be reduced by fitting the cistern with a dual flushing system.