Lesson 4 of 5
In Progress

4. Water

Graham Soper 7 January 2021
  • About 71% of the planet’s surface constitutes water. The interesting fact is that the amount of water on Earth is constant and is recycled throughout. It, therefore, means some of the water you drink today, at one point in the past may have passed through some of the species that are now extinct – maybe even a dinosaur!  
  • Today, we use about 10 billion tons of water worldwide.  But it is not evenly spread out between the different regions. By 2050, 4 out of 10 people in the world population will live in areas of severe water stress. 
  • As of today, more than 700 million people do not have access to clean water and more than 2 billion have sanitation problems.  6 to 8 million people die annually from water-borne diseases and disasters. 
  • Agriculture uses up 70% of our global freshwater. And this goes up to 90% in fast developing countries. 
  • Sadly, the speed of groundwater pollution doubled between 1960 and 2000. 
  • The Niagara Falls process 750,000 gallons of water every second! 
  • There is more water vapour in the atmosphere than all the combined rivers on the planet. 
  • Only 3% of our planet’s water is drinkable but only about 1% can actually be used by humans. 97% of the world’s water is salt water, whilst more than half of the Earth’s freshwater can be found frozen in the glaciers. The rest is underground or exists in rivers, ponds, glaciers, ice caps, lakes, as water vapor and our taps, among other water bodies.  
  • The water in our lakes, ponds, streams, rivers, ponds and other surface water makes up 0.3% of our freshwater resource. 
  • You may be interested to know that 25% of the bottled water you buy is really municipal tap water.