About: http://webisa.webdatacommons.org/321137645

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Nitrogen dioxide, NO2, one of the precursors to O3, was monitored using diffusion tubes at the same sites.
http://www.w3.org/ns/prov#wasQuotedFrom	ukzn.ac.za