Can I open the window for ventilation in foggy days?

Under normal circumstances, it is not allowed to open the window for ventilation in foggy days. But you can choose to open a small window for ventilation in the morning and evening when the smog is not very big.

Relevant experts suggest that you can open the window twice a day, that is, before getting up every morning and before going to bed at night. Although not opening the window in foggy days can reduce the harm of pm2.5 to human body, if there is insufficient oxygen in the air, it will easily lead to poor breathing. Therefore, opening the window properly can still increase the indoor oxygen content and ensure that people's health is not threatened.

In foggy weather, it is recommended to wear a mask when you go out and wash your hands and put on clean clothes when you come back. You should also eat more fruits and vegetables and supplement vitamin C in your daily life, which can effectively prevent the harm of smog weather to human health.