About: urban air pollution

Premodifier: urban air
Head noun: pollution

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

Broader concepts

label	provenance	confidence
atmospheric problem	isap:28880479	0.731314
environmental problem	isap:28880498	0.624496
threat	isap:136063619	0.606907
problem	isap:28880371	0.416353
need	isap:149826636	0.374713

Narrower concepts

label	provenance	confidence