About: air pollution problem

Premodifier: air pollution
Head noun: problem

Same concepts

Broader concepts

label	provenance	confidence

Narrower concepts

label	provenance	confidence
acid rain	isap:6837500	0.763451
ground level ozone	isap:222684179	0.641593
ground-level ozone	isap:222684177	0.536626
smog	isap:7141061	0.353750
ozone	isap:222684176	0.349863
haze	isap:4164301	0.311924