Sawdust is a by-product or waste product of woodworking operations such as sawing, sanding, milling and routing. It is composed of very small chips of wood. These operations can be performed by woodworking machinery, portable power tools or by use of hand tools. In some manufacturing industries it can be a significant fire hazard and source of occupational dust exposure.
Sawdust made with hand saw
Ogatan, Japanese charcoal briquettes made from sawdust
Sawdust vendors in Kashgar markets
Wood shavings made from a chainsaw in wet wood
A mulch is a layer of material applied to the surface of soil. Reasons for applying mulch include conservation of soil moisture, improving fertility and health of the soil, reducing weed growth, and enhancing the visual appeal of the area.
Bark chips applied as mulch
Rubber mulch nuggets in a playground. The white fibers are nylon cords, which are present in the tires from which the mulch is made.
Shredded wood used as mulch. This type of mulch is frequently dyed for aesthetic reasons.
Pine needles used as mulch. Also called "pinestraw" in the southern US.