the annual greenhouse gas emissions from electrical production in the United States are equal to or less than 65 percent of the annual greenhouse gas emissions from electrical production in the United States for calendar year 2017, the amount of the clean energy production credit under subsection (a) for any qualified facility placed in service during a calendar year described in paragraph (2) shall be equal to the product of— (A) the amount of the credit determined under subsection (a) without regard to this subsection, multiplied by (B) the phase-out percentage under paragraph (2). (2) Phase-out percentage The phase-out percentage under this paragraph is equal to— (A) for a facility placed in service during the first calendar year following the calendar year in which the determination described in paragraph (1) is made, 75 percent, (B) for a facility placed in service during the second calendar year following such determination year, 50 percent, (C) for a facility placed in service during the third calendar year following such determination year, 25 percent, and (D) for a facility placed in service during any calendar year subsequent to the year described in subparagraph (C), 0 percent. (e) Definitions In this section: (1) CO 2 e per KWh The term CO 2 e per KWh means, with respect to any greenhouse gas, the equivalent carbon dioxide per kilowatt hour of electricity produced. (2) Greenhouse gas The term greenhouse gas has the same meaning given such term under section 211(o)(1)(G) of the Clean Air Act ( 42 U.S.C. 7545(o)(1)(G) ), as in effect on the date of the enactment of this section. (3) Qualified facility (A) In general Subject to subparagraphs (B) and (C), the term qualified facility means a facility which is— (i) used for the generation of electricity, and (ii) originally placed in service after December 31, 2018. (B) 10-year production credit For purposes of this section, a facility shall only be treated as a qualified facility during the 10-year period beginning on the date the facility was originally