Zhang Y X
Baotou Medical College.
Zhonghua Yu Fang Yi Xue Za Zhi. 1990 Jan;24(1):13-5.
We designed "passive measures" to control air pollution from burning coal in living rooms and have found the results satisfactory in reducing air pollution. The measures were simple, feasible and effective. They can be widely applied in the cold regions where living rooms are heated by burning coal.
