The air purifier can become the school standard expert recommends the introduction of rules?
The air purifier can become the school standard expert recommends the introduction of rules? Outdoor PM2.5 burst table, kindergarten indoor air quality is also worrying, pictured recently in a nursery classroom measured PM2.5 index. Recently, the provincial capital of haze shrouded, PM2.5 continuous burst table, a lot of parents to the kindergarten, primary and secondary schools to install indoor air purification system (device). The data show that the outdoor PM2.5 index burst table, kindergarten, primary school classroom in the air PM2.5 [...]