About: amount of air pollutant

Head noun: amount
Postmodifier: of air pollutant

Same concepts

Broader concepts

label	provenance	confidence

Narrower concepts

label	provenance	confidence
carbon monoxide	isap:478413616	0.680145
particulate matter	isap:392474690	0.676823
particulate matter pm	isap:107411301	0.658018