 They spend much time on harvesting energy resources and thus correspondingly consume their physical energy, which bring chronic fatigue to women.Moreover, the women and children, who spend much time in their kitchens to serve their families and stick around their moms to help moms' house chores, respectively, are in danger of long-term exposure to indoor air pollution caused by burning the traditional biomass.During the combustion, carbon monoxide, particles, benzene, and the likes threat their health.