A method for operating a combustion machine, such as an internal combustion engine, has the following steps: provision of a combustion machine for producing thermal energy; operation of the combustion machine, and thereby burning fuel to obtain the thermal energy; detection of the concentration of at least one pollutant, which is produced during the combustion, in the surroundings of the combustion machine; regulation of the operation of the combustion machine, in which a characteristic variable of the combustion machine is set according to the detected concentration in such a way that the emission of the pollutant is reduced.