Mere sunlight can be used to eradicate pollutants in water

Source: Science Daily

Advances in environmental technology: You don’t need complex filters and laser systems to destroy persistent pollutants in water. Chemists have developed a new process that works using mere sunlight. The process is so simple that it can even be conducted outdoors under the most basic conditions.

https://www.sciencedaily.com/releases/2018/11/181126123309.htm