NOVELTY - Device comprises: (a) a container configured to contain a composition and comprising insulated walls, air intake and a vent; and (b) a composition contained in container. The composition comprises aerobic microorganisms, a carbon source and nutrient source sufficient to support growth of the microorganisms under aerobic conditions. The container comprises insulation sufficient to retain heat generated by aerobic respiration by the microorganisms in composition, and has dimensions configured, to create a stack effect that moves air into the air intake, through the composition and out the vent.    USE - The device is useful for promoting growth of thermophilic organisms, and creating a compost which is useful as a fertilizer (all claimed). No biological data given.    ADVANTAGE - The device provides the compost which does not have any detectable living organisms pathogenic to humans, in a environmental friendly and cost effective manner.    DETAILED DESCRIPTION - Device comprises: (a) a container configured to contain a composition and comprising insulated walls, an air intake and a vent; and (b) a composition contained in the container. The composition comprises aerobic microorganisms, a carbon source and a nutrient source sufficient to support growth of the aerobic microorganisms under aerobic conditions. The container comprises insulation sufficient to retain heat generated by aerobic respiration by the aerobic microorganisms in the composition, and has dimensions configured, to create a stack effect that moves air into the air intake, through the composition and out the vent. The moving air provides an aerobic environment to the aerobic microorganisms to support growth of the aerobic microorganisms. INDEPENDENT CLAIMS are also included for:    (1) promoting (M1) growth of the aerobic microorganisms, comprising: providing the container configured to contain a composition and comprising insulated walls, an air intake and a vent; providing, in the container, a composition comprising aerobic microorganisms, a carbon source and a nutrient source sufficient to support growth of the aerobic microorganisms in an aerobic environment; and growing the aerobic microorganisms in the composition by maintaining an aerobic environment, where the aerobic environment is provided by maintaining a stack effect that moves air into to the air intake, through the composition and out the vent, and the movement of air is maintained by heating air in the container with heat generated by aerobic respiration of the aerobic microorganisms, and contained in the container by the insulation; and    (2) creating (M2) a compost, comprising: collecting human excrement; mixing the human excrement with a carbon source; and composting the mixture in the device.    DESCRIPTION OF DRAWING(S) - The figure illustrates the schematic representation of the device.