ABSTRACT
Air pollution poses a serious global environmental concern, with studies indicating that both short and long-term exposure to gaseous pollutants have adverse effects on both the environment and human health. Kano state, being one of Nigeria's largest industrial state has encountered rapid population growth, deforestation and industrialization. The study aim to assess air quality in Kano State twith the use of a secondary data obtained directly from Google Earth Engine, primarily sourced from the Sentinel-5P satellite equipped with the Tropospheric Monitoring Instrument (TROPOMI). The data from Sentinel-5P, with its high spatial resolution and accuracy, is essential for monitoring air quality. Data was collected from January to December of 2019, 2021, and 2023 for each pollutant, the mean concentration of NO2 for each of the year (2019, 2021 and 2023 ) was 0.000053496 Molm2, 0.000053875Molm2 and 0.000059204 Molm2. The mean concentration of CO for each of the year (2019, 2021, 2023) was 0.037261722Mol/m2, 0.036934466 Mol/m2 and 0.036447386Mol/m2. The mean concentration for aerosol for each of the study period (2019, 2021, and 2023) was -0.364553104bMol/m2, -0.06049543cMol/m2 and 0.596068513aMol/m2. The analysis of the result revealed that NO2 concentrations showed a slightly increase from 2019 to 2021 and then a further increase in 2023, while CO concentrations showed a slight decrease along the study period, and aerosol levels increased significantly. Statistical tests indicated no significant difference (p>0.05) in NO2 and CO concentrations over the study period, suggesting stable emissions and favorable developments, respectively, However, aerosol levels showed very high significant increase (p<0.001), indicating changes and increase in emissions and atmospheric conditions in Kano State, Although NO2 and CO levels have remained relatively stable with no significant changes there is still the need to maintain continuous monitoring to keep track any changes in their levels, the high significant increase in aerosol concentrations requires the need for continued monitoring and assessment of air quality in Kano State.
