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
A rape victim will have to re-live her ordeal in court because of a police mistake.
Bank chiefs have apologised to a teenager refused a bank account because her forms were written in Welsh.
Hull City midfielder Sam Clucas is expected to agree personal terms and have a medical on Wednesday.