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
47 is the average age when people in Wales stop relying on their parents and start looking after them, according to new research.
Staying rather cloudy for much of the day in the south, perhaps with a little rain at first.
Mostly dry with clear spells developing tonight in the north, which will allow some mist and fog patches to form.