SimilarityRank
nitrogen_oxide 0.841 78932
air_pollutant 0.779 77087
particulate_matter 0.776 54856
sulfur_dioxide 0.765 93673
emission 0.734 4559
particulate 0.722 43599
CO2 0.716 9699
Co_2 0.716 19859
Co_2_emission 0.710 88444
carbon_monoxide 0.708 39006
pollutant 0.707 14162
greenhouse_gas 0.696 18514
GHG 0.689 70082
carbon_dioxide 0.677 11994
reduce_emission 0.677 41104
methane 0.674 14641
ozone 0.671 18722
CO2_emission 0.671 26256
carbon_dioxide_emission 0.665 61386
emission_from 0.665 32492
soot 0.663 42732
combustion_of 0.662 77006
air_pollution 0.662 13199
GHG_emission 0.656 52810
emission_reduction 0.646 34127