Inorganic substances are those that do not contain carbon or have structures that are not carbon-based. Inorganic substances can be naturally occurring, produced intentionally and incorporated in products, or produced unintentionally and released as byproducts. Exposure to inorganic chemicals include ingestion through drinking water (e.g., nutrients, metals), dermal through contact with contaminated soil (e.g., carbon-containing inorganics and metals), and inhalation (e.g., carbon monoxide, fibers including asbestos).
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