What is the function of putting charcoal in a decorated room?

After wood is burned into charcoal, countless tiny holes will be formed inside. The surface area of charcoal with weight 1 g can reach 250 square meters. These pores have the functions of adsorbing various substances and releasing the adsorbed substances, thus playing the role of purifying the air. Charcoal absorbs moisture when it is wet, and releases the absorbed moisture when it is dry, thus playing an excellent role in regulating humidity. In addition, charcoal can also eliminate indoor odor and harmful substances.