There are several aspiration and air purification systems which can be used in indoor workplaces such as factories and workshops to protect people from illnesses and machines from breakdowns. The problem of dust is more difficult to solve in outdoor workplaces such as quarries, aggregate processing plants as well as demolition and excavation sites. Here, hosepipes and sprinklers are usually used to wet the interested area in order to suppress dust. However, these systems consume a lot of water and form muddy puddles or streams, which can transport dust outside the area affecting public roads and consequently, expanding the problems. In addition to that, the suppressing action finishes immediately by the switching off if traditional systems are used and if these are not automatic enough, people must be employed to wet the ground. According to the Italian laws in force (Italian Decree n. 47 dated 11/03/1988), in underground workplaces machines and systems must be used only producing as less dust as possible (art. 53). To avoid the release of dust into the air, you are also obliged to use an aspiration system (art. 55) and special sprinklers, and not intense jets to wet the walls during excavation(art. 54). Aggregate must be wet before its removal (art.59).