Clean air act (42 u.s.c. 7545(o)(1)) July 8, 2019 16 32 64 128 Clean air act 42 usc 7545 o )( 1 )) Clran air act Clean air act us code Clean air act (42 u.s.c. 7545(o)(1)(h)) Clean air act (42 u.s.c. ยง 7522(a)(3))