Diatomaceous Earth
Ever since tens of millions of years ago, single-celled algae called "diatoms" existed, and they have been supplying 70% of the oxygen on which the earth relies — a real cradle of life indeed. At the end of their life span, diatoms' cell walls deposit at the bottom of the ocean. Over time, fossilization occurs, and a very porous bio-sedimentary rock "diatomite" is formed. When it is crushed into a powder, it is called "diatomaceous earth". Being a natural rock powder, diatomaceous earth requires a small amount of fixation agent (usually concrete or resin) in order to be made into a product. Some of these products' characteristics include: humidity regulating, deodourizing, anti-bacterial, and fireproofing. Read more...