For both methods it is important that the raw material is cleanly segregated from the residual waste – without heavy metals which come, for example, from batteries. In 2004, more than 5 million tonnes of compostable waste were collected separately in Germany, processed into energy and compost and fed back into the natural cycle as a high-quality soil improver. This also partly compensated for the annual natural erosion.

Compostable waste which goes to landfill without treatment emits methane into the air for up to 100 years and also contaminates the ground water.

In all countries of the world a major contribution can be made to the reduction of the amount of waste by composting the separately collected "green“ waste from households. The environment will be relieved, as well, by the reduction of methane and the avoidance of contaminated leachate. In this way we actively contribute to the sustainable protection of our environment.