Although traffic-borne pollution has been increasing recently in Gaza City (GC), no studies have tackled the issue in a quantitative manner. This study investigated quantitatively the atmospheric carbon dioxide (CO₂ ) concentrations in three heavily-trafficked streets (sites X, Y, and Z) in GC, using a locally manufactured device. Measurements were performed during a weekday and a weekend in three specific times, including two rush hours. Green-cover was investigated using the top-down approach for photo interpretation in the selected sites. Furthermore, the awareness of the local population toward greening their streets was tested using two questionnaires. Measured atmospheric CO₂ concentrations ranged between 300 ppm and 900 ppm in all selected sites. Atmospheric CO₂ concentrations were highest in site X and lowest in Y. Green-cover percentage was found to be 2%, 3%, and 8% for sites X, Y, and Z, respectively. Generally, higher levels were detected during the working day compared to those detected during the weekend. Additionally, high atmospheric CO₂ concentrations were detected in streets with reduced green-cover as well as streets with workshops flanked on both sides. The questionnaires’ analysis illustrated sound awareness among respondents regarding the researched aspect.
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