| 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 |