About: secondary pollutant

Premodifier: secondary
Head noun: pollutant

Same concepts
http://dbpedia.org/resource/Air_pollution

Broader concepts

label	provenance	confidence
pollutant	isap:351621919	0.428479

Narrower concepts

label	provenance	confidence
sulfuric acid	isap:288041750	0.811161
ground-level ozone	isap:335096556	0.638928
nitrogen dioxide	isap:318504776	0.600523
ozone o3	isap:97733311	0.600192
ozone	isap:335096530	0.597389
acid rain	isap:290250194	0.525712
formaldehyde	isap:112359877	0.479493
o3	isap:97733305	0.336830