Recently, the weather in Xi 'an is often foggy, and there are various levels of early warning. How should citizens take protective measures?

Close doors and windows to purify the air.

In foggy days, family members should close the doors and windows, wait until the smog disappears and the sun rises, and then open the window for air. The filter screen of the air purifier can effectively adsorb harmful substances and purify the air.

Wear a mask and go out less.

In foggy weather, citizens should go out as little as possible, cancel morning exercises, and wear medical masks when going out to avoid diseases caused by respiratory irritation; When you come back from going out, you should wash your face and expose your skin immediately.