An apparatus for controlling fermentation of natural material, comprising: one or more sensors configured to measure at least one property of natural material ; a container configured to contain a chemical reactive agent reducing or limiting a fermentation process of the natural material ; a valve coupled with the container ; and a controller , communicatively coupled with the one or more sensors and operatively coupled with the valve , configured to process the measured at least one property of the natural material , and, if the processing meets a predetermined condition, control the valve to open so that the chemical reactive agent is released into the natural material in order to limit the fermentation process of the natural material to prevent a spontaneous combustion of the natural material, wherein the apparatus is configured to be insertable into the natural material so that the apparatus further comprises a self-sufficient energy source configured to provide electric energy for the apparatus , and a water-proof casing encapsulating the apparatus , wherein the controller is configured so that the processing meets the predetermined condition, if the controller autonomously detects that the at least one property meets a predetermined threshold, and wherein the container is pressurized, whereby the opening of the valve causes the chemical reactive agent to flow into the natural material 150 due to the pressure, and/or the container is positioned above the valve , whereby the opening of the valve causes the chemical reactive agent to flow into the natural material due to the Earth's gravity, and/or the valve is coupled with a pump, whereby the opening of the valve causes the chemical reactive agent to flow into the natural material due to a pumping action by the pump. one or more sensors configured to measure at least one property of natural material ; a container configured to contain a chemical reactive agent reducing or limiting a fermentation process of the natural material ; a valve coupled with the container ; and a controller , communicatively coupled with the one or more sensors and operatively coupled with the valve , configured to process the measured at least one property of the natural material , and, if the processing meets a predetermined condition, control the valve to open so that the chemical reactive agent is released into the natural material in order to limit the fermentation process of the natural material to prevent a spontaneous combustion of the natural material, wherein the apparatus is configured to be insertable into the natural material so that the apparatus further comprises a self-sufficient energy source configured to provide electric energy for the apparatus , and a water-proof casing encapsulating the apparatus , wherein the controller is configured so that the processing meets the predetermined condition, if the controller autonomously detects that the at least one property meets a predetermined threshold, and wherein the container is pressurized, whereby the opening of the valve causes the chemical reactive agent to flow into the natural material 150 due to the pressure, and/or the container is positioned above the valve , whereby the opening of the valve causes the chemical reactive agent to flow into the natural material due to the Earth's gravity, and/or the valve is coupled with a pump, whereby the opening of the valve causes the chemical reactive agent to flow into the natural material due to a pumping action by the pump. <EOS>