; (B) the information collected through the system established pursuant to subsection (b); (C) any health risks or impacts of fume or smoke events on flight crews, including flight attendants and pilots, and passengers onboard aircraft operating under part 121 of title 14, Code of Federal Regulations; (D) instances of persistent or regularly occurring (as determined by the National Academies) fume or smoke events in such aircraft; (E) instances of accidental, unexpected, or irregularly occurring (as determined by the National Academies) fume or smoke events on such aircraft, including whether such accidental events are more frequent during various phases of operations, including ground operations, taxiing, take off, cruise, and landing; (F) the air contaminants present during the instances described in subparagraphs (D) and (E) and the probable originating materials of such air contaminants; (G) the frequencies, durations, and likely causes of the instances described in subparagraphs (D) and (E); and (H) any additional data on fume or smoke events, as determined appropriate by the National Academies. (3) Recommendations As a part of the study conducted under paragraph (1), the National Academies shall provide recommendations— (A) that, at minimum, address how to— (i) improve overall cabin air quality of passenger-carrying aircraft; (ii) improve the detection, accuracy, and reporting of fume or smoke events; and (iii) reduce the frequency and impact of fume or smoke events