Several beehives are placed in Düsseldorf airport (Germany). It turns out that the analysis of honey and ambrosia structure is a good and trustworthy way of following the pollution of the environment. Bees gather raw material – nectar and blossom dust from nearby plants, thus concentrating the whole pollution in honey. Twice a year honey trial checks the presence of hydrocarbon and heavy metals that can ingress the air from engine exhausts of airplanes and support machinery. The tests show that the quality of the honey in the airport corresponds to that of villages, free from any industry. Six other German airports followed the example of Düsseldorf.