Environmental

Which of the following substances found in older Iowa homes is regulated under the Toxic Substances Control Act (TSCA)?

AMold and mildew
BPolychlorinated biphenyls (PCBs) found in old electrical transformers and caulking materials✓ Correct
CRadon gas
DCarbon monoxide from heating systems

Explanation

PCBs (polychlorinated biphenyls) are regulated under TSCA. They were used in electrical equipment (transformers, capacitors) and some caulking materials in older buildings.

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