Cement From Thin Air | Popular Science

Cement From Thin Air | Popular Science: "In 2009 his latest company, Calera, started putting that insight into practice at a 1,000-megawatt power plant in Moss Landing, California. Engineers there spray mineral-rich seawater or brine water through flue gas captured from the plant’s smokestacks. The calcium in the water bonds with carbon in the would-be pollution to form cement. Constantz says the demonstration plant is capable of producing up to 1,100 tons of cement a day and, in doing so, sequestering 550 tons of carbon dioxide. Within three years, he says, Calera will be operating plants in Australia and Wyoming."