; (iii) the existing standard technologies and practices of covered facilities with respect to the discharge and emission of pollutants into the environment; and (iv) the best available technologies and practices that reduce or eliminate the environmental justice and pollution impacts of covered facilities and the products of covered facilities. (B) Failure to enter agreement If the Administrator fails to enter into an agreement described in subparagraph (A), the Administrator shall conduct the study described in that subparagraph. (2) Requirements The study under paragraph (1) shall— (A) consider— (i) the direct, indirect, and cumulative environmental impacts of the industries of covered facilities to date; and (ii) the impacts of the planned expansion of those industries, including local, regional, national, and international air, water, waste, climate change, public health, and environmental justice impacts of those industries; and (B) recommend technologies, standards, and practices to remediate or eliminate the local, regional, national, and international air, water, waste, climate change, public health, and environmental justice impacts of covered facilities and the industries of covered facilities. (3) Report Not later than 18 months after the date of enactment of this Act, the Administrator shall submit to Congress a report describing the results of the study under paragraph (1). (d) Clean air (1) Timely revision of emissions standards Section 111(b)(1)(B) of the Clean Air Act ( 42 U.S.C. 7411(b)(1)(B) ) is amended by striking the fifth sentence. (2) National source performance standards implementation improvements (A) Zero-emissions energy Not later than 3 years after the date of enactment of this Act, the Administrator shall promulgate a final rule requiring that— (i) covered facilities that manufacture olefins, including ethylene and propylene, use only zero-emissions energy sources, except to the extent that waste gases are recycled