Aug. 4, 2014, The Wall Street Journal
As the Southwest U.S. grapples with a devastating drought, one Texas city is undertaking an experiment to conserve its rapidly depleting water supply.
Wichita Falls is mixing a biodegradable polymer with water and applying it to the surface of the Lake Arrowhead reservoir in hopes of reducing the rate of evaporation by about 10%.
The particles—made from hydrated lime and an extract of palm oil—form a molecular net that impedes water from escaping into the air.
Julia Harte 