| Carbon Origin | Point source capture plant | A | CO2 emitted to atmosphere from mining/processing coal |
| B | CO2 emitted to atmosphere from transporting coal | ||
| C | CO2 emitted to atmosphere from burning coal | ||
| D | CO2 captured from flue gas | ||
| E | CO2 emitted to atmosphere | ||
| Direct air capture plant | F | CO2 captured from atmosphere | |
| G | CO2 emitted to atmosphere | ||
| Transport | H | CO2 emitted to atmosphere by transport of CO2 to injection or utilization site | |
| Disposition | Carbon sequestration | I | CO2 emitted to atmosphere by injection process |
| J | CO2 stored in geological formation | ||
| Other carbon utilization | K | CO2 emitted to atmosphere in conversion for commercial use (other than EOR) | |
| L | CO2 stored in products (but returns to atmosphere when products are burned or decompose) | ||
| Carbon used for Enhanced Oil Recovery (EOR) | M | CO2 emitted to atmosphere from oil production and multiple cycling injections | |
| N | CO2 remaining in underground oil reservoir | ||
| O | CO2 emitted to atmosphere from crude transport | ||
| P | CO2 emitted to atmosphere from crude oil refining | ||
| Q | CO2 emitted to atmosphere from oil combustion |