NOVELTY - A composting apparatus (100) comprises container (102) having at least one first volume (104) for receiving material to enable aerobic composting of the material; access mechanism having first condition for enabling material to be placed in at least one of the first volume, and second condition preventing access to the or each first volume; and air duct mechanism for transporting air at ambient temperature from first location within container to a second location below at least one first volume by mechanism of gas at higher than ambient temperature, resulting from compositing of material.    USE - Composting apparatus, particularly mobile composting apparatus.    ADVANTAGE - The apparatus avoids use of significant numbers of moving parts having narrow manufacturing tolerances, thus providing low cost and low maintenance for aerobic composting. The air duct mechanism does not need to be accessible to exterior of the container, thus preventing vermin such as rats and flies from entering. The apparatus also has effective thermal insulation and simple manufacturing process. The volume of air flow is self-regulated to reach desired 60 degrees C. It minimizes extent to which compaction of material to be composted causes composting process to become anaerobic; and enables leachate to drain from composting process, which in turn reduces the extent to which process becomes anaerobic; and is easily transported to place where compost is required to be deposited or collected.    DETAILED DESCRIPTION - Composting apparatus (100) comprises container (102) having at least one first volume (104) for receiving material to enable aerobic composting of the material; access mechanism having first condition for enabling material to be placed in at least one of the first volume, and second condition preventing access to the or each first volume; and air duct mechanism for transporting air at ambient temperature from first location within container to a second location below at least one first volume by mechanism of gas at higher than ambient temperature, resulting from compositing of material, rising in at least one of the first volume. A gas at higher than ambient temperature resulting from composting of material can exit from container, and air at ambient temperature can enter container, when access mechanism is in second condition.    DESCRIPTION OF DRAWING(S) - The drawing is a cross sectional perspective side view showing a composting apparatus.    Composting apparatus (100)    Container (102)    First volume (104)    Insulating layer (110)    Wheels (112)