Although 24-h mean PM2.5 concentration between fuel types differed statistically (P < 0.05), post hoc
pairwise comparison indicated no significant difference in mean concentration of PM2.5 between
improved biomass stoves and traditional stoves (P > 0.05). The study revealed indoor air pollution is a
major environmental and health hazard from home using biomass fuel in Addis Ababa. The use of clean
fuels and efficient cooking stoves is recommended.