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...of exposure, regional or global sources have significant effects. Volcanic eruptions can increase the atmospheric source by 4–6 times.<ref>{{cite web|url=http ...es |publisher= Center for Biologics Evaluation and Research, U.S. Food and Drug Administration}}</ref>

...ake some types of [[rubber]]s, [[lubricant]]s, [[dye]]s, [[detergent]]s, [[drug]]s, [[explosive]]s, [[napalm]] and [[pesticide]]s. ...ced and naturally occurring chemical from processes that include: volcanic eruptions, wild fires, synthesis of chemicals such as phenol, production of synthetic

== Acneiform eruptions == {{see also|Category:Acneiform eruptions}}