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Salaga sits as a critical crossroads in the Savannah Region of Ghana, historically serving as a pivotal hub for trade and commerce. The town is characterized by a flat, undulating terrain typical of the Guinea Savannah, where open grasslands are interspersed with hardy, fire-resistant trees. This low-lying topography allows for the unimpeded movement of air masses, which is a primary driver of its local atmospheric conditions. Situated far from the tempering influence of the Atlantic coast, Salaga experiences a continental climate where extreme heat and dryness prevail for much of the year. The urban character is a blend of traditional residential clusters and bustling market zones, creating a distinct urban-rural gradient where the outskirts are dominated by subsistence agriculture. The surrounding landscape is an agricultural belt focused on yams, maize, and shea nuts, which significantly impacts air quality through seasonal biomass burning. Because the town lacks significant topographic barriers like mountains, it is highly susceptible to the transboundary movement of mineral dust. The lack of dense industrial belts means that pollution is primarily non-industrial, originating from road dust and domestic combustion. The proximity to small streams and seasonal water bodies provides minimal cooling, leaving the town exposed to high solar radiation. Consequently, the interplay between the flat terrain and the agricultural surroundings creates a scenario where particulate matter remains suspended during the dry months, defining the city's environmental profile and affecting the respiratory health of its residents throughout the year.

The air quality in Salaga is governed by a binary seasonal cycle: the dry season and the wet season. From November to March, the region is dominated by the Harmattan, a dry, dusty wind blowing from the Sahara Desert. During these months, pollution peaks as massive quantities of mineral dust blanket the town, reducing visibility and increasing particulate matter concentrations. Temperature inversions during cool Harmattan mornings can trap smoke from domestic charcoal fires and agricultural clearing near the ground, making the air heavy and irritating. This period is the most hazardous for sensitive groups, including children and the elderly, who should limit prolonged outdoor exertion. Conversely, the wet season, spanning April to October, brings a dramatic improvement in air quality. Frequent rainfall serves as a natural scrubbing mechanism, washing particulates from the atmosphere and suppressing the rise of road dust. The prevailing southwesterly winds bring moisture and cleaner air from the Gulf of Guinea, leading to the lowest pollution levels of the year. October and November represent a volatile transition, where the first waves of dry air return. For those with respiratory conditions, the peak Harmattan months of December and January are the most challenging, requiring protective measures like face masks. Outdoor activities are best scheduled for the rainy season or the late afternoons of the dry season when wind speeds often increase, helping to disperse stagnant pollutants and clear the hazy horizon, reducing the risk of acute respiratory distress.