1. If there is smoke and haze, use face masks or cloth, cotton or linen, with several thousand expected to compound come smoke and mouth and nose protection may absorb water that dank cloth to filter more gas.
1 If you are in an area with smoke and smog, use a mask or cloth made of cotton or linen thousands folds into a mouth and nose to prevent smoke and sprinkled water on a damp cloth to wipe the gas filter. more
1 if stay in the area with smoke and haze to use masks or cloth made of cotton or ลินินพ several fold belt the mouth and nose to prevent smoke and water, damp cloth carpet . in order to absorb gas filter.