Environmental indicators of dual-fuel hydrogen engine Andrei Kuleshov, Aleksey Kuleshov, Mikhail Gordin, Vladimir Markov, Feodor Karpets and Matvey Shlenov E3S Web Conf., 417 (2023) 03018 Published online: 21 August 2023 DOI: 10.1051/e3sconf/202341703018