id	keyword
brj-23985	et al
brj-23985	doi
brj-23985	metal
brj-23985	concentrations
brj-23985	elements
brj-23985	pollution
brj-23985	rings
brj-23985	air
brj-23985	article
brj-23985	ppb
brj-23985	plants
brj-23985	species
brj-23985	koç
brj-23985	environmental
brj-23985	study
brj-23985	nigra