And, it's riddled with shards of glass and metallic iron.

而且，它布满了玻璃碎片和金属铁。

(The ore is iron oxide, and the oxygen is plucked from this to leave metallic iron by its reaction with the carbon in coke .) Less steel equals less CO2.

（矿石是氧化铁，通过与焦炭中的碳反应，从中提取氧气以留下金属铁。）更少的钢等于更少的二氧化碳。