[kristianp]

Depending on which source you look at, steel production accounts for 8% - 11% of global CO2 emissions. According to Gate's 2021 book, 'getting around' (planes, trucks, cargo ships) accounts for 16% of CO2 emissions. So steel production is definitely a significant contributor.

[thehappypm]

I get that, but steel is kind of “worth it”. Civilization can’t function without steel right now. Meanwhile energy has a gazillion alternatives. Priorities.