Chapter 2 of 8
The gap
What you owe is the distance between your intensity and your target, times your output.

Carbonado
Carbon atom, four bonds · your guide to the market
Our plant emits 0.90 tonnes of CO₂ per tonne of cement. The target is 0.82. That difference, 0.08, is the gap.
The gap is per tonne of cement, so we multiply it by output. 0.08 × 1,000,000 = 80,000 tonnes. That is what the plant must cover with allowances at year end.
Notice what it is not. It is not 0.82 × 1,000,000. That number is what the target allows, not what you owe.
Carbonado says:
Remember this
Owed = (your intensity − your target) × your output. Beat the target and the same sum gives you credits instead.
In the game: The play screen shows this as OVER TARGET or UNDER TARGET, with the tonnes beside it.