; and (2) degradation of carbon sinks relating to the use of biomass as an energy source. (d) Report The National Academy of Sciences shall prepare a report that includes any findings and recommendations made pursuant to this section and, not later than 18 months after the date of the enactment of this Act, make such report electronically available to the public. 8. Amendments to the Clean Air Act (a) In general Title III of the Clean Air Act ( 42 U.S.C. 7601 ) is amended by adding at the end the following: 330. Suspension of regulation of fuels and emissions based on greenhouse gas effects (a) Fuels Unless specifically authorized in section 202, 211, 213, or 231 or this section, if a carbon fee is imposed by section 9902 or 9908 of the Internal Revenue Code of 1986 with respect to a covered fuel, the Administrator shall not enforce any rule limiting the emission of greenhouse gases from the combustion of that fuel under this Act (or impose any requirement on any State to limit such emission) on the basis of the emission’s greenhouse gas effects. (b) Emissions Unless specifically authorized in section 202, 211, 213, or 231 or this section, if a fee is imposed by section 9904 of the Internal Revenue Code of 1986 with respect to a fluorinated greenhouse gas, the Administrator shall not enforce any rule limiting such gas under this Act (or impose any requirement on any State to limit such gas) on the basis of the greenhouse gas effects of such gas. (c) Authorized regulation Notwithstanding subsections (a) and (b), nothing in this section limits the Administrator’s authority pursuant to any other provision of this Act— (1) to limit the emission of any greenhouse gas because of any adverse impact on health or welfare other than its greenhouse gas effects; (2) in limiting emissions as described in paragraph (1), to consider the collateral benefits of limiting the emissions because of greenhouse gas effects