Particulates are tiny pieces of solid or liquid matter associated with the Earth's atmosphere. Some particulates are occured by natural phenomenons such as volcanoes and dust storms. However, since human activities are influencing to some mechanical movements, pollutants from burning of fossil fuels, power plants, and various industrial processes also generate significant amounts of particulates.

These contaminated particles could give us a serious effects, including lung cancer. To avoid these dangerous environment pollutant, we should control ourselves from going outside when the ultrafine particles concentration is lasting above 120?g/m?per hour for more than 2 hours. Moreover, we should change masks frequently.

The Earth is getting hotter and hotter due to more and more developing industries that affect very critical impacts to the Earth and creatures by emitting some fatal pollutants. Therefore, we should at least make an effort to prevent the worst case unless we improve this environmental problem directly.