SimilarityRank
dioxide 0.897 4762
sulphur 0.839 6647
monoxide 0.834 12904
nitrogen 0.815 6386
oxide 0.811 7892
particulate 0.802 25930
nitrous 0.785 29606
tetrachloride 0.784 38419
phosgene 0.782 98640
ethane 0.781 70857
hydrocarbon 0.780 12320
co2 0.778 18793
hydrogen 0.774 5285
benzene 0.766 21692
methane 0.766 11786
emission 0.765 3620
vocs 0.761 67555
refrigerant 0.756 52632
cfc 0.754 9251
nox 0.753 28969
gaseous 0.751 22356
nitric 0.745 22052
&sub2; 0.743 34174
vanadium 0.743 61827
yttrium 0.741 62626