toilet to tap n.— «Atwater plans to ramp up efforts to recycle wastewater for potable use, as Orange County has already done. (This process is sometimes disparagingly referred to as “toilet to tap.” In fact, it produces water...
chalcogel n.— «The discovery, reported in the latest issue of Science magazine, has proven to be the ideal cleaner for waters infested with heavy metals like cadmium, lead or mercury. Chalcogel is a rigid material that can be used to...