; and (2) in subsection (d)(2), by adding at the end the following: (F) Carbon sequestration. . III Market Incentives for Carbon Sequestration 301. Sustainable building and residence credit (a) In general Subpart B of part IV of subchapter A of chapter 1 of the Internal Revenue Code of 1986 is amended by adding at the end the following new section: 30E. Sustainable building and residence credit (a) In general There shall be allowed as a credit against the tax imposed by this chapter for the taxable year an amount equal to the sustainabililty percentage of the taxpayer’s purchase price of a qualifying building or residence. (b) Applicable percentage For purposes of this section— (1) In general The sustainability percentage with respect to any building or residence shall be a percentage equal to the lesser of— (A) the percentage by which the sustainability score for such building or residence exceeds the average sustainability score for the class to which such building or residence belongs, or (B) 25 percent. (2) Sustainability scoring (A) In general Not later than 1 year after the date of the enactment of this section, the Secretary (in consultation with the Secretary of Energy) shall establish— (i) a certification process for determining a sustainability score with respect to any building for purposes of the credit allowed under this section, and (ii) an average sustainability score for different classes of buildings for purposes of the comparison under subsection (b)(1)(A). (B) Factors for score Such score shall at least take into account the following factors: (i) The energy required to produce and deliver materials used in construction of the building, measured by the estimated tonnage of carbon emitted. (ii) The energy required to operate the building on a yearly basis, measured by an estimate the tonnage of carbon dioxide emitted. (iii) The amount of carbon dioxide retained by the building which could otherwise be released into the atmosphere, taking into account building construction materials and processes