Areas around the airport have been repeatedly cleared and reforested since the 70s. Clearing is in legal terms an intervention in nature and the landscape for which the perpetrator must make corresponding compensation. The respective compensation is made by agreement with the authorities either by means of a reforestation programme or by making a financial payment. Düsseldorf Airport was the first Düsseldorf business to set up a green account managed by the Office for Gardens, Cemeteries and Forestry. This account comprises areas within the city of Düsseldorf which the airport has bought in order to improve them ecologically.