Air purifier is also useful in serious environment
According to reports, the global annual number of deaths due to poor air quality caused by millions. Air pollution is a global problem. However, the air pollution has not been enough attention, especially in the indoor air quality. Most people only through the eyes and nose to determine the indoor air quality, like PM2.5, bacteria and formaldehyde are "invisible", this method of judgment is invalid. Especially in summer, high temperature conditions, the photochemical reaction in the air will be enhanced, two...