VOCs are spread in the atmosphere comes from many sources, typically sources of volatile organic compounds has two main sources. The volatile organic compounds that occur naturally, such as forest fires gas from decayed organic matter. As well as the digestive and breathing human. Volcanic eruptions or from some plants that produce volatile organic compounds into the atmosphere, and so on. However, volatile organic compounds resulting from the activities of the human sources of VOCs significant and a cause of environmental problems that nowadays are more violent today.