SimilarityRank
nitrogen_oxide 0.852 78932
particulate_matter 0.795 54856
air_pollutant 0.783 77087
NOx 0.765 71494
carbon_monoxide 0.749 39006
carbon_dioxide 0.735 11994
particulate 0.732 43599
ozone 0.722 18722
greenhouse_gas 0.704 18514
pollutant 0.701 14162
soot 0.697 42732
ammonia 0.693 28243
methane 0.686 14641
smog 0.686 39059
air_pollution 0.679 13199
sulfur 0.675 33667
benzene 0.670 50027
emission 0.667 4559
coal-fired_power_plant 0.653 61016
Co_2 0.651 19859
sulphur 0.647 51354
acid_rain 0.645 69028
water_vapor 0.643 40856
CO2 0.642 9699
emission_from 0.640 32492