from the that's-very-kind-of-the-sunlight dept.
MTorrice writes "With energy-efficient desalination techniques, water-starved communities could produce fresh water from salty sources such as seawater and industrial wastewater. But common methods like reverse osmosis require pumping the water, which uses a substantial amount of energy. So some researchers have turned to forward osmosis, because in theory it should use less energy. Now a team has demonstrated a forward osmosis system that desalinates salty water with the help of sunlight. The method uses a pair of hydrogels to absorb and squeeze out freshwater."
"Don't try to outweird me, three-eyes. I get stranger things than you free
with my breakfast cereal."
- Zaphod Beeblebrox in "Hithiker's Guide to the Galaxy"