Scientific approach" at 14:35 on Radio Russia! Runny nose from the plant The air in megacities is permeated with harmful particles. There are big ones - those that our body filters in the nasopharynx and upper respiratory tract - these are pollen, dust from construction sites, roads. But they also emit man-made dust that is not visible to the eye - these are car exhausts and emissions from factories. High concentrations of these tiny particles pose a serious health risk. And science confirms it. The fact is that they have high catalytic activity. They easily penetrate cells and stimulate the formation of free radicals - aggressive particles that destroy proteins that are important for the functioning of the immune system and may damage DNA. As a result, oxidative stress develops, the immune system weakens and colds occur. In Russia, thanks to a clean air project, the situation is changing before our eyes - boiler houses are equipped with powerful exhaust purifiers, heating in houses is switching from coal to gas, and more electric public transport is appearing on the roads. Therefore, by 2030 they plan to reduce the emission of hazardous substances by at least 20 percent. Author and presenter of the program: Lyubov Strelnikova - editor-in-chief of the magazine "Chemistry and Life" Listen Subscribe to Radio Russia on Telegram | MAX and download the official app of Radio Russia!