Concrete's future looks lighter, greener | csmonitor.com: "ncrete is probably used more widely than any other substance except water, yet it remains largely unappreciated.
'Some people view the 20th century as the atomic age, the space age, the computer age - but an argument can be made that it was the concrete age,' says Hendrik van Oss, a cement specialist with the United States Geological Survey. 'It's a miracle material.'"