[NorthMountain]

Please explain to me how burning hydrogen yields carbon dioxide.

2(H₂) + O₂ ==> 2(H₂O)

[William of Barsoom]

Yup. That’s right. My Bad.
(First two sips of covfefe hadn’t kicked in yet.)

Burning hydrogen in plain air yields only some water vapor, as you said.

I hang my head in shame.