; table of contents. Sec. 2. Tax on carbon dioxide content of certain substances. Sec. 3. Energy Refund Program. Sec. 4. Consumer tax rebate. 2. Tax on carbon dioxide content of certain substances (a) In general Chapter 38 of the Internal Revenue Code of 1986 (relating to environmental taxes) is amended by adding at the end thereof the following new subchapter: E Tax on carbon dioxide content of certain substances Sec. 4691. Imposition of tax. Sec. 4692. Refunds or credits. Sec. 4693. Border adjustments. Sec. 4694. Definitions and special rules. 4691. Imposition of tax (a) In general There is hereby imposed a tax on any taxable carbon substance sold by the manufacturer, producer, or importer thereof. (b) Amount of tax (1) In general The amount of tax imposed by subsection (a) on any taxable carbon substance shall be the applicable amount per ton of carbon dioxide content of such substance, as determined by the Secretary in consultation with the Secretary of Energy. (2) Fractional part of ton In the case of a fraction of a ton, the tax imposed by subsection (a) shall be the same fraction of the amount of such tax imposed on a whole ton. (3) Applicable amount For purposes of paragraph (1)— (A) In general For calendar year 2019, the term applicable amount means $49. (B) Annual adjustments generally In the case of any taxable year beginning in a calendar year after 2019, the dollar amount in subparagraph (A) shall be increased by an amount equal to— (i) such dollar amount, multiplied by (ii) the cost-of-living adjustment determined under section 1(f)(3) for the calendar year in which the taxable year begins, determined— (I) by substituting calendar year 2018 for calendar year 1992 in subparagraph (B) thereof, and (II) by substituting for the CPI referred to section 1(f)(3)(A) the amount that such CPI would have been if the annual percentage increase in CPI with respect to each year after 2019 had been 2 percentage points greater. (c) Substance taxed only once No tax shall be imposed by subsection (a) with respect to