"A new way of processing rice husks for use in concrete could lead to a boom in green construction.
Rice husks form small cases around edible kernels of rice and are rich in silicon dioxide, an essential ingredient in concrete. Scientists have recognized the potential value of rice husks as a building material for decades, but past attempts to burn it produced an ash too contaminated with carbon to be useful as a cement substitute...." Read the full article.
By Michael Reilly, MSNBC Tues., July 7, 2009
