As you know, the air in large cities is characterized by a high level of pollution. As a rule, our respiratory system is quite effective at cleaning the air that comes in. However, sometimes our lungs need extra protection. Forest and peat fires, prolonged lack of precipitation, lack of wind (it provokes the accumulation of carbon monoxide and hydrocarbons in one place) are especially dangerous for our respiratory system are. How to protect your respiratory system from the smog and dust of th...