What is Reverse osmosis?
[[File:Simple RO schematic.png|thumb|300px|A reverse osmosis system<br>''A'' – Applied pressure<br>''B'' – Seawater in<br>''C'' – Particles<br>''D'' – Membrane<br>''E'' – Clean water out<br>''F'' – Distribution]] '''Reverse osmosis''' is a way of [[wikt:purifying|purifying]] water with the use of a filter (a membrane). The particles in the water are left on the other side of the sheet, while the water travels through it.The main use is for [[Desalination|purifying salt water]], but it can also be used to purify other substances. <!-- == References == {{reflist}} --> {{tech-stub}} [[Category:Water]]