| Share | Phrase |
|---|
| 26.15% | unacceptable [effectiveness] level |
| 8.87% | unacceptable [effectiveness] amount |
| 8.27% | unacceptable [effectiveness] emission |
| 7.19% | unacceptable [effectiveness] contamination |
| 7.17% | unacceptable [effectiveness] degree |
| 7.00% | unacceptable [effectiveness] quality |
| 6.29% | unacceptable [effectiveness] leakage |
| 5.72% | unacceptable [effectiveness] loss |
| 5.01% | unacceptable [effectiveness] become |
| 4.02% | unacceptable [effectiveness] delay |
| 3.65% | unacceptable [effectiveness] render |
| 3.31% | unacceptable [effectiveness] region |
| 3.07% | unacceptable [effectiveness] speed |
| 2.90% | unacceptable [effectiveness] condition |
| 1.32% | generally unacceptable |