 |
| carbonisation: 50 phrases in 14 subjects |
| Agriculture | 3 |
| Analytical chemistry | 2 |
| Chemistry | 13 |
| Coal | 10 |
| Electronics | 2 |
| Environment | 2 |
| General | 1 |
| International trade | 1 |
| Materials science | 1 |
| Metallurgy | 5 |
| Natural resourses and wildlife conservation | 5 |
| Oil / petroleum | 1 |
| Technology | 3 |
| Transport | 1 |