Some results of indoor particulate (PM) concentrations measurements in relation to type of stove and fuel from Latin-America are presented in table . The improved stoves, such as the plancha, produce PM or PM levels that are often only 20 percent of concentration levels from an open fire, and are even found to be less than 10 percent of that of an open fire in a study in Guatemala by McCracken and Smith (1998). The reduction in PM seems to be even larger than reductions in PM 10. However the concentration levels.
