SimilarityRank
nitrogen_oxide 0.758 78932
sulfur_dioxide 0.749 93673
particulate_matter 0.721 54856
NOx 0.708 71494
methane 0.697 14641
carbon_dioxide 0.694 11994
ammonia 0.694 28243
air_pollutant 0.686 77087
formaldehyde 0.676 47313
benzene 0.667 50027
ozone 0.664 18722
soot 0.655 42732
particulate 0.653 43599
radon 0.648 66432
Co_2 0.639 19859
water_vapor 0.637 40856
CO2 0.631 9699
water_vapour 0.630 85308
toluene 0.630 94465
combustion 0.630 26558
nitrous_oxide 0.628 58827
propane 0.628 42218
combustion_of 0.625 77006
oxygen 0.622 6930
vapor 0.622 29093