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The present study deals with the determination of 36 elements in  Pinus roxburghii  plant needles to assess their potential as biomonitor for elemental air pollution monitoring. The elemental quantification was made by employing Instrumental Neutron Activation Analysis (INAA) and Atomic Absorption Spectrometric (AAS) techniques. The needles of  Pinus roxburghii  were collected in spring, summer and winter seasons from various sites in Islamabad. The method validation was performed by analyzing two certified reference materials i.e., Citrus leaves – NIST-SRM-1572 and IAEA-Soil-7. Pollution level was assessed by using three indicators: enrichment factor, pollution load index and average toxic element concentration. The results indicated that the needles of  Pinus roxburghii  plant had potential to monitor the extent of air pollution in the vicinity of high traffic areas.

Pinus roxburghii plant needles as a three-season biomonitor for elemental air pollution monitoring along roadside