| soil | 0.44 |
| urine | 0.32 |
| window cleaners | 0.25 |
| air | 0.25 |
| dissolve in water | 0.47 |
| be a source of nitrogen | 0.42 |
| contribute to nutrition… | 0.41 |
| react with water | 0.40 |
| consist of one nitrogen… | 0.38 |
| consist of three hydrog… | 0.38 |
| accumulate in the blood | 0.38 |
| react with acid | 0.37 |
| hurt the quality of the… | 0.37 |
| kill fish | 0.36 |
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| death | 0.32 |
| burn | 0.30 |
| olfactory fatigue | 0.24 |
| adaptation | 0.23 |
| irritation | 0.23 |
| inflammation | 0.21 |
| blindness | 0.19 |
| coma | 0.19 |
| corrosion | 0.16 |
| nausea | 0.16 |
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| strong odor | 0.32 |
| lower boiling point | 0.28 |
| different specific grav… | 0.25 |
| low odor threshold | 0.16 |
| eutrophication | 0.23 |
| acidification | 0.16 |
| compound | 0.49 |
| base | 0.38 |
| weak base | 0.37 |
| the starting compound | 0.28 |
| potent cleaning compound | 0.26 |
| the nitrogen cycle | 0.28 |
| produced | 0.73 |
| converted to nitrate | 0.69 |
| removed | 0.64 |
| produced by the fish | 0.63 |
| used as fertilizer | 0.58 |
| excreted by fish | 0.58 |
| converted to urea | 0.57 |
| converted to nitrite | 0.55 |
| liberated | 0.54 |
| used as refrigerant | 0.54 |
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