What should boys do when they walk home alone in foggy weather?

Pay attention to smog weather:

First, wear a mask when going out to prevent small particles of bacteria from entering the body through our mouth and respiratory organs, thus causing pathogens.

Second, eat more fruits and vegetables, clear lung food, drink more water, and eliminate harmful substances in the body.

Third, don't close the window too tightly. In order to prevent smog from entering the room, let's not let harmful gases in the room go out.

Fourth, drink more tea that moistens the intestines and clears the lungs.

Fifth, watch the road. The harmful gases emitted by roads are not only higher than those in other places, but also blocked by smog. The road is not clear, be careful of traffic accidents.