; (iii) a personal hygiene product that, due to the intended use of the product, could become unsafe or unsanitary to recycle, such as a diaper; or (iv) packaging used for— (I) any product described in clause (i), (ii), or (iii); or (II) the shipment of hazardous materials, and is prohibited from being composed of used materials under section 178.509 or 178.522 of title 49, Code of Federal Regulations (as in effect on the date of enactment of this subtitle). (29) Source reduction (A) In general The term source reduction means a reduction in the quantity of covered products or beverage containers produced by a producer, as compared to a baseline established pursuant to section 12105(b), including due to— (i) shifting to reusable or refillable packaging or food service product systems; or (ii) eliminating unnecessary packaging. (B) Exclusions The term source reduction does not include— (i) replacing recyclable or compostable single-use plastic packaging or food service products with— (I) a nonrecyclable or noncompostable single-use plastic packaging or food service products; or (II) single-use plastic packaging or food service products that are less likely to be recycled or composted; or (ii) switching from virgin single-use plastic packaging or food service products to plastic post-consumer recycled material. (30) Toxic substance (A) In general The term toxic substance means any substance, mixture, or compound that— (i) may cause— (I) personal injury or disease to humans through ingestion, inhalation, or absorption through any body surface; or (II) adverse impacts on the environment; and (ii) satisfies 1 or more of the conditions described in subparagraph (B). (B) Conditions The conditions referred to in subparagraph (A)(ii) are the following: (i) The substance, mixture, or compound is subject to reporting requirements under— (I) the Emergency Planning and Community Right-To-Know Act of 1986 ( 42 U.S.C. 11001 et seq. )