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Lobogo, nestled within the Mono Department of Benin, occupies a geographically significant position in the country’s southern region. Located at approximately 6.6333° latitude and 1.9000° longitude, the town’s terrain is characterized by gently undulating hills transitioning into a broader, low-lying plain. This topography influences local air circulation patterns; cooler, denser air tends to settle in the lower areas, potentially trapping pollutants under certain meteorological conditions. The surrounding landscape is a mosaic of small-scale agriculture – predominantly cocoa, coffee, and plantain cultivation – interspersed with patches of dense tropical forest. This agricultural activity, while vital to the local economy, contributes to particulate matter emissions, particularly during harvesting and processing seasons. Lobogo’s proximity to the Mono River, though not directly adjacent, influences regional humidity and rainfall patterns, which in turn affect the dispersion of airborne pollutants. The urban–rural gradient around Lobogo is relatively gradual, with small villages and agricultural plots blending seamlessly into the town’s periphery. There are no major industrial belts immediately surrounding Lobogo; however, larger industrial centers are located further north, and prevailing winds can occasionally transport pollutants from those areas. The elevation, relatively low, means that temperature inversions, common in more mountainous regions, are less frequent but can still occur, leading to localized air quality degradation. The town’s position within a humid tropical climate zone dictates a high rate of evapotranspiration, which can impact the concentration of certain volatile organic compounds (VOCs).

Lobogo’s tropical climate dictates a distinct wet and dry season cycle, profoundly impacting its air quality. The dry season, typically spanning from November to March, often witnesses a slight increase in particulate matter concentrations. This is largely attributable to reduced rainfall, which limits the natural cleansing effect of precipitation, and increased agricultural burning for land preparation. While wind speeds are generally moderate, periods of calm can lead to localized pollutant accumulation, especially in the lower-lying areas of the town. The wet season, from April to October, brings more frequent rainfall and higher humidity, generally leading to improved air quality as pollutants are washed from the atmosphere. However, heavy downpours can temporarily increase fungal spore counts, potentially affecting individuals with respiratory sensitivities. Fog, though infrequent, can occur during the cooler months (December-January), trapping pollutants near the ground and exacerbating air quality issues. During the peak of the dry season (January-February), sensitive groups, including children, the elderly, and those with pre-existing respiratory conditions, should limit prolonged outdoor activity, particularly during the early morning hours when pollutants may be more concentrated. Conversely, the wetter months offer a more favorable window for outdoor recreation. Agricultural practices, particularly the burning of vegetation, pose a recurring challenge, and community awareness campaigns promoting alternative land management techniques are crucial. The interplay of humidity, rainfall, and wind patterns creates a dynamic air quality profile throughout the year, requiring ongoing monitoring and adaptive strategies.