indoor air quality

High levels PM2.5 at indoor air quality

January 6, 2015 Cindy 0

When the haze is no longer news, no haze is news, people have become accustomed to wearing masks walk through the vast visibility less than 30 meters thick fog in. However, in the room, or entered a relatively enclosed public space subway, underground shopping malls, conference room, people are often willing to remove the mask, because I believe the indoor air quality is slightly better than the outside.