The actual principle involved in the working of any Air Pollution device consists of sucking the pollutants from all sources. Once, this is achieved, this polluted air is passed through an appropriate media. Now what is this media, this media can either be a bag house which consists of filter material stacked together to dry filter the air or this media could be a wet scrubber which apart from taking care of the particulates, also dissolves the harmful gases with water and flushes them out. This water can be cleaned later for drainage.