; and (B) by inserting or after the semicolon; (2) by striking clause (ii); and (3) by redesignating clause (iii) as clause (ii). (i) Report on emissions emanating from outside the United States Not later than 24 months after the date of enactment of this Act, the Administrator, in consultation with States, shall submit to the Congress a report on— (1) the extent to which foreign sources of air pollution, including emissions from sources located outside North America, impact— (A) designations of areas (or portions thereof) as nonattainment, attainment, or unclassifiable under section 107(d) of the Clean Air Act ( 42 U.S.C. 7407(d) ); and (B) attainment and maintenance of national ambient air quality standards; (2) the Environmental Protection Agency’s procedures and timelines for disposing of petitions submitted pursuant to section 179B(b) of the Clean Air Act ( 42 U.S.C. 7509a(b) ); (3) the total number of petitions received by the Agency pursuant to such section 179B(b), and for each such petition the date initially submitted and the date of final disposition by the Agency; and (4) whether the Administrator recommends any statutory changes to facilitate the more efficient review and disposition of petitions submitted pursuant to such section 179B(b). (j) Study on ozone formation (1) Study The Administrator, in consultation with States and the National Oceanic and Atmospheric Administration, shall conduct a study on the atmospheric formation of ozone and effective control strategies, including— (A) the relative contribution of man-made and naturally occurring nitrogen oxides, volatile organic compounds, and other pollutants in ozone formation in urban and rural areas, including during wildfires, and the most cost-effective control strategies to reduce ozone