The combustion of waste results in the production of a mixture of gases containing pollutants such as carbon dioxide, sulphur dioxide, dust and soot, as well as nitrogen oxides, heavy metal bearing fumes and unburned hydrocarbons.

The pollutants can be removed from the flue gases by using the latest flue gas cleaning systems, so that harmful organic and inorganic substances are no longer discharged into the atmosphere. These substances are partly incorporated in the reaction-neutral slag or concentrated in the filter dust as end product of the flue gas cleaning process, allowing them to be deposited safely underground.

Pollutants are therefore continuously removed from the environmental cycle - pollutants that were formerly emitted to the environment from waste dumps.