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article i nfo Article history: This study was undertaken to assess the potential of two types of improved cookstoves to reduce indoor air pollution in African homes. An ethanol stove, the CleanCook, was tested in three locations in Ethiopia: the city of Addis Ababa and the Bonga and Kebribeyah Refugee Camps, while a wood-burning rocket stove, the Gyapa, was evaluated in Accra, Ghana. In both countries, kitchen concentrations of PM2.5 and CO, the two pollutants responsible for the bulk of the ill-health associated with indoor smoke, were monitored in a before and after study design without controls. Baseline ('before') measurements were made in households using a traditional stove or open fire. 'After' measurements were performed in the same households, once the improved stove had been introduced. PM2.5 was measured using UCB Particle Monitors, which have photoelectric detectors. CO was measured with Onset HOBO Loggers. In Ghana and Kebribeyah Camp, CO was also measured with Gastec diffusion tubes. In Ghana, average 24-hour PM2.5 concentrations decreased 52% from 650 μg/m 3 in the 'before' phase to 320 μg/m 3 in the 'after' phase (p=0.00), and average 24-hour kitchen CO concentrations decreased 40% from 12.3 ppm to 7.4 ppm (p=0.01). Including all three subgroups in Ethiopia, average PM2.5 concentrations decreased 84% from 1 250 μg/m 3 to 200 μg/m 3 |
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