| Similarity | Rank | |
|---|---|---|
| NOx | 0.840 | 55787 |
| CO2 | 0.810 | 9992 |
| dioxide | 0.805 | 10273 |
| sulfur | 0.790 | 22001 |
| nitrogen | 0.788 | 12237 |
| sulphur | 0.781 | 34384 |
| C02 | 0.780 | 94587 |
| oxides | 0.776 | 42880 |
| Dioxide | 0.773 | 69551 |
| particulates | 0.769 | 55487 |
| gases | 0.766 | 11662 |
| particulate | 0.765 | 32316 |
| Nitrogen | 0.759 | 45976 |
| ammonia | 0.754 | 21773 |
| sulfide | 0.750 | 49224 |
| carbonic | 0.747 | 83563 |
| emissions | 0.745 | 4569 |
| hydrocarbons | 0.745 | 32458 |
| ozone | 0.743 | 18222 |
| VOCs | 0.740 | 56195 |
| GHGs | 0.738 | 91201 |
| methane | 0.738 | 19799 |
| gasses | 0.738 | 45276 |
| CO | 0.733 | 11074 |
| Ammonia | 0.729 | 78473 |