What low-tech method did ancient Egyptians employ to help filter air passing through dwellings?

Answer

Wet mats

The earliest documented methods for rudimentary air cleaning involved simple physical techniques, predating modern machinery. Specifically, the ancient Egyptians utilized wet mats placed strategically within dwellings. The function of these wet mats was to interact with the airflow passing through the living spaces. As air moved across the damp surface of the mats, particulate matter suspended in the air would adhere to the moist fibers, effectively trapping some of the contaminants before the air circulated further within the structure. This passive filtration method highlights an early recognition of airborne contamination issues in densely settled communities, focusing on accessible, low-tech solutions rather than mechanical or chemical processes.

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