<p><span style="font-family:Arial,Helvetica,sans-serif">The&nbsp; present study was carried out to assess the dust interception efficiency and impact of dust deposition on biochemical parameters of&nbsp; plant species growing alongside National Highway (NH-7) at Sirmaur, H.P, India. Plants are universal sink of CO₂. The plant species selected for the study were <em>Ficus roxburghii, Mallotus philippensis, Shorea robusta, Woodfordia fruticosa.</em> The observed trend of dust accumulation was in the order <em>Ficus roxburghii</em>&nbsp; (38.30 mg m^-2) &gt; <em>Shorea robusta</em> (26.94 mg m^-2),&gt; <em>Mallotus philippensis</em> (22.31 mg m^-2) &gt; <em>Woodfordia fruticosa</em> (16.70 mg m^-2). The present study revealed, that the leaf dust accumulation decreased with increasing distance from the national highway. Leaf dust accumulation was influenced by the seasons of the year&nbsp; with the maximum (30.70) in pre-monsoon and the&nbsp; minimum(21.42) in post-monsoon season.</span></p>