Household CO and PM measured as part of a review of China's national improved stove program

For that study, a subsample of 396 Chinese rural households were monitored. The results of the measurements showed that for nearly all household stoves or fuel groupings, PM4 levels were much higher than the national PM10 standard for indoor air. It relies on unprocessed solid fuels that emit substantial pollution into the household environment.
Improved stoves exist but are still not at levels that meet standards, and very often other unimproved stoves are present in the kitchen.
The authors conclude that low-emission technologies and high combustion-efficiency biomass stoves need to be promoted urgentlly to prevent Chinese rural population's health .