1. The vehicle engine exhaust car trouble is the source most
2. The smoke and toxic gases from Industrial Plants
3. particle origins, such as the construction of Woz
charcoal furnace, carbon trading impossible being cremated
4. Sources of economically self that which cometh from sticking, and rubbish
5. The smoke of burning the forest burned farms and from smoking
6. The nuclear weapon test cause of spray radioactive
7.the examination and treatment of radiation science of radio-isotopes in the lack of the correct measures to prevent air condition,
8. air that is caused by a natural phenomenon such as forest fire volcano earthquake