SimilarityRank
dioxide 0.902 4762
monoxide 0.850 12904
nox 0.839 28969
carbon 0.839 3195
nitrogen 0.829 6386
hydrocarbon 0.827 12320
oxide 0.824 7892
particulate 0.822 25930
tetrachloride 0.821 38419
emission 0.815 3620
&sub2; 0.812 34174
nitrous 0.809 29606
pollutant 0.801 10281
hexafluoride 0.786 78594
methane 0.783 11786
trioxide 0.783 83599
chlorine 0.779 10537
dioxin 0.775 17452
co2 0.772 18793
phosgene 0.770 98640
ozone-depleting 0.769 40272
halon 0.768 27495
nitric 0.766 22052
chlorofluorocarbon 0.764 24061
benzene 0.764 21692