persistent
| carbonhydrid
| persistent | |
| environ. chem. | persistant |
| carbonhydrid | |
| chem. | hydrocarbures cancérogènes |
| environ. | hydrocarbure |
| |||
| persistant | |||
|
persistent : 36 phrases in 9 subjects |
| Agriculture | 1 |
| Chemistry | 5 |
| Energy industry | 1 |
| Environment | 22 |
| Health care | 1 |
| Insurance | 1 |
| Mathematics | 1 |
| Medical | 3 |
| Statistics | 1 |