agreement means an agreement with 1 or more countries which— (A) reduces or eliminates tariffs and non-tariff barriers between the countries party to such agreement, and (B) is approved by Congress. (15) Greenhouse Gas The term greenhouse gas has the meaning given such term in section 98.6 of title 40, Code of Federal Regulations (as in effect on the date of enactment of this subchapter). (16) HTS The term HTS means the Harmonized Tariff Schedule of the United States. (17) International partnership agreement The term international partnership agreement means an international partnership agreement established pursuant to title II of the Foreign Pollution Fee Act of 2023 . (18) Nonmarket economy country The term nonmarket economy country has the meaning given such term in section 771(18) of the Tariff Act of 1930 ( 19 U.S.C. 1677(18) ). (19) Point source pollution The term point source pollution means pollution emitted into the ambient air at the site of the manufacturing of a product. (20) Pollution The term pollution means greenhouse gas emissions. (21) Pollution intensity The term pollution intensity means the amount of greenhouse gases (as determined under section 4693), expressed in metric tons of carbon dioxide equivalent, which are emitted into the atmosphere in the production of a single unit of a covered product (as determined pursuant to section 4691(c)). (22) Pollution intensity difference The term pollution intensity difference means, with respect to any covered product, the difference (expressed as a percentage) between— (A) the pollution intensity associated with production of such product in the country of origin, and (B) the baseline pollution intensity with respect to such product. (23) Producer The term producer means the entity responsible for the creation of a product through— (A) a manufacturing process, or (B) in the case of a geologic resource, extraction. (24) Product The term product means any article, regardless of whether such article is— (A) exported from the country of origin, or (B)