1. A method for detecting explosive materials, in a testing area to be examined, the method comprising: a) aerial spreading of biosensors on the surface of the testing area to be examined, wherein the biosensors have the ability to metabolize explosive materials and provide an indicator signal of such metabolism; b) waiting a sufficient amount of time for interaction of the biosensors with the explosive materials for the metabolism of the explosive materials and activation of the biosensors; c) laser scanning the biosensors and surface of the testing area by an aerial-supported source of at least one laser, thereby using a laser irradiating with at least a first defined wavelength corresponding to the stimulation radiation of the biosensors to stimulate the biosensors; d) detecting simultaneously at the measuring point a first signal corresponding to the surface reflection signal of the laser, having the same wavelength as the stimulation wavelength and serving for geo-referencing of the measuring point and a second fluorescent signal, having a longer wavelength and showing presence of activated biosensors at the measuring point, to provide data for a digital terrain model showing topographic detail of the surface testing area and locations of the explosive materials.