Consider your surroundings for a moment. You are living in a global water treatment system called the hydrological cycle. The heat of the sun is constantly evaporating water from our seas, rivers and lakes and it then condenses into clouds before raining back to earth as purified water. That's pure water mind you -it doesn't contain inorganic minerals or other impurities and it's not meant to.

Understanding that rain water is the world's most natural and readily available source of pure drinking water let us consider what happens to this pure water next. Once it falls from clouds it starts to pick up emissions from our industries, vehicles and homes.

These are toxic impurities that were never meant to be in our drinking water. Once it reaches the ground it then starts to come into contact with the myriad of impurities that exist naturally in soil and bed rock and of course the man made substances like tarmac, concrete, metals, paint, agricultural chemicals like nitrates, phosphates, pesticides, herbicides. Of course there is then all the waste that we bury in land-fill. Most pollution comes from industry and we develop thousands of new chemical compounds every year that ultimately re-enter the air we breathe and the water we drink and the food we eat.

Pure water will always be the foundations of our health. Remember that the world is constantly purifying water in the sky but as rain touches down it starts to become polluted.