 |
| dióxido de carbono: 43 phrases in 16 subjects |
| Agriculture | 6 |
| Chemistry | 6 |
| Earth sciences | 2 |
| Ecology | 1 |
| Economy | 1 |
| Electronics | 2 |
| Environment | 6 |
| General | 1 |
| Health care | 1 |
| Life sciences | 3 |
| Mechanic engineering | 6 |
| Medical | 2 |
| Natural sciences | 2 |
| Nuclear physics | 1 |
| Taxes | 2 |
| Technology | 1 |