Fine dust refers to a mixture of solid particles and droplet particles in the air. These particles have various shapes and sizes because they are emitted not only from natural sources but also from various types of fixed or mobile sources. Fine dust is emitted directly from the emission source or is produced secondary by gaseous substances such as sulphur dioxide and nitrogen oxides. Fine dust aggravates respiratory diseases such as asthma and causes deterioration of lung function. In addition, fine dust deteriorates visibility, is deposited on the leaf surface of plants and interferes with metabolism, and is deposited on buildings, causing corrosion to sculpted relics and statues.