Sand
Sand is divided into one of 3 grades, from soft to hard.
Grade 1 sand is the finer sand used on beaches
Grade 2 is a coarse sand used in industry
Grade 3 sand is considered unpractical and unusable. Every year, millions of tonnes of it is discarded into the worlds oceans.
All content copyright Tom Crowley
page revision: 0, last edited: 24 Jul 2008 14:45