What ancient sailors expressed with frustration when they found themselves stranded in the middle of the ocean, as I understand it, short of drinking water. But in this poem, what he said almost two centuries ago is certainly relevant in real life today. One of the most serious threats to humanity in the coming decades is the shortage of fresh, clean water. Today, the earth is still rich in seawater, but not in fresh water. The global situation is that less than 3% of the world's water is fresh, the rest is seawater and is undrinkable. Thus, the 7 billion inhabitants of the planet must rely on this 0.5% of fresh water for all the needs of humans and the ecosystem, because the remaining 2.5% is frozen. Source: Water Business Council for Sustainable Development (Fry, 2006). whose number is expected to increase by approximately 9 billion by 2050, the World Bank predicts that two-thirds of the world's population will be without safe drinking water by 2025. (Network, 2012). This means that water consumption is increasing at a rate more than twice that of global population growth. Rarity of drinking ...