About: pollution tax

Premodifier: pollution
Head noun: tax

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

Broader concepts

label	provenance	confidence

Narrower concepts

label	provenance	confidence
carbon	isap:404660087	0.364487
cap	isap:280561345	0.311966
trade	isap:325076902	0.304769