Helping more people around the world to have access to safe drinking water is one of the greatest challenges of the 21st century.
But a company from Carmarthenshire are aiming to improve the situation, with their pioneering technology for purifying water.
The technology takes three minutes to clean the water. We've sped up that process for you in the video below, so you can see how it works.
More top news
Farmer Gareth Wyn Jones is hoping for a festive online hit with footage of sheepdog Cap rounding up sheep.
It is expected to remain wet and windy for the rest of today, overnight and tomorrow. Conditions improving on Christmas Eve
In this clip from 1959 Father Christmas gets some very practical requests for Christmas Day.