https://www.wxxinews.org/local-news/2022-07-05/electric-buses-are-all-the-buzz-but-rts-thinks-hydrogen-might-be-better-for-rochester-winters
Invisible flame
Pt.I https://m.youtube.com/watch?v=HzWkDHJHmQU
Pt II https://m.youtube.com/watch?v=usE78db5HO8