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ABSTRACT
This study was carried out to assess the concentrations of Carbon monoxide (CO) and Ozone (O3) in Owerri and Port Harcourt. Secondary data collection method was used for the assessment, levels of carbon monoxide (CO) and Ozone (O3) was extracted annually from Google Earth Engine using information from Sentinel-5-P satellite data (COPERNISCUS/S5P/NRTI/L3_). A comparison of the levels of Carbon monoxide (CO) and Ozone (O3) was done from the year 2019 to the year 2022. Results showed that the annual mean concentrations of carbon monoxide (CO) ranged from '0.044mol/m² to 0.065 mol/m²', in Port Harcourt and 0.043mol/m² to 0.061mol/m² in Owerri the highest concentrations were found in the year 2020 and the lowest were found in the year 2019 while in Port Harcourt the highest concentration were found in the year 2020 and the lowest were found in year 2019; the implications of this higher concentration is that it may lead to respiratory diseases, lung cancer, heart diseases and damage to other organs. Annual mean concentrations of Ozone (O3) ranged from 0.118mol/m²' to '0.126mol/m²' in Port Harcourt and Owerri which may be due to biomass burning, emissions from industrial activities vehicular, and can lead to conditions like asthma and increase susceptibility to respiratory infections in humans. Constant monitoring of the air quality and atmospheric pollutants to ensure early detection of a decrease or increase in the concentration of atmospheric pollutants, implementation of an air pollution control policies, spatial data collection, air quality modeling, hotspot identification and source distribution using the geographic information system (GIS), promotion of cleaner technologies including the use of low-emission vehicles, renewable energy sources, energy efficient processes, public awareness and education on the impact of atmospheric pollutants and the human contributions to the increasing production of atmospheric pollutants is recommended.
