Could you verify the temperature? Absolute zero is -273.15 C. Or did you mean positive 700C?
I think the intention was to place ‘700°C’ within the arrow, like so: -(…)->.
Is carbon monoxide valuable?
The article says it is a precursor for other chemicals so yes. If you just let it out as is it is probably pollution of a different kind, since CO can kill in high enough concentration.
I thought CO just steals one more oxygen / whatever wherever it can find to become stable which is what makes it toxic? CO hemoglobin?