Assessment of Trace Metals Concentration in Tree Barks as Indicator of Atmospheric Pollution within Ibadan City, South-West, Nigeria

Figure 2

Metal concentrations in tree backs collected from all sampling zones. INZ: industrial zone; HTZ: high traffic commercial zone; RHZ: residential high traffic zone; RLZ: residential low traffic zone; CTZ: control zone.

(a)

(b)

(c)

(d)

(e)

(f)