Abstract: Solutions containing microorganisms differing in characteristics from each other and living in symbiosis with each other and enzymes characterized by containing aerobic microorganisms, anaerobic microorganisms and at least one basidiomycete belonging to the family Pleurotaceae living in symbiosis, metabolites thereof and enzymes; carriers obtained by adsorbing the components of the above solutions onto finely ground carbonaceous materials; and porous materials obtained by adsorbing the components of the above solutions onto porous materials. Because of having various effects of absorbing, adsorbing and decomposing harmful matters, deodorizing, decolorizing, etc., these materials are applicable to various uses in the fields of agriculture and environment.