the Secretary (in consultation with the Administrator of the Environmental Protection Agency) necessary to ensure that the total fees collected under such section with respect to coal are equal to the total amount of such fees that would be collected on coal if the fee imposed under section 4691(a)(1) also applied to the carbon-dioxide equivalent of greenhouse gas emissions reported under subsection (a)(2)(B)(i). (2) Petroleum products In the case of any calendar year beginning after 2020, the fee imposed under section 4691(a)(1) with respect to petroleum products shall be increased by the amount determined by the Secretary (in consultation with the Administrator of the Environmental Protection Agency) necessary to ensure that the total fees collected under such section with respect to petroleum products are equal to the total amount of such fees that would be collected on petroleum products if the fee imposed under section 4691(a)(1) also applied to the carbon-dioxide equivalent of greenhouse gas emissions reported under subsection (a)(2)(B)(ii). (3) Natural gas In the case of any calendar year beginning after 2020, the fee imposed under section 4691(a)(1) with respect to natural gas shall be increased by the amount determined by the Secretary (in consultation with the Administrator of the Environmental Protection Agency) necessary to ensure that the total fees collected under such section with respect to natural gas are equal to the total amount of such fees that would be collected on natural gas if the fee imposed under section 4691(a)(1) also applied to the carbon-dioxide equivalent of greenhouse gas emissions reported under subsection (a)(2)(B)(iii). 4695. Border adjustments for energy-intensive manufactured goods (a) Purpose The purpose of this section is to ensure the environmental effectiveness of this subchapter. (b) Exports (1) In general In the case of any energy-intensive manufactured good which is exported from the United States, the Secretary shall pay to the person exporting such good a refund