.
The atmosphere contains a lot of dust, which travels from the surface of the Earth and, partially, from space, as strong winds pick up water particles from the seas and oceans. The small pieces of salt contained in the water are brought into the air. As a result of volcano eruptions, forest fires, industrial wastes, etc; air becomes polluted with products not completely burned .
There are some basic sources of pollution of the atmosphere: industries, transportation devices, and others. Due to recent studies, we now know that industrial production and its waste products are the strongest pollutant of the air. Their sources of pollution are thermal power stations, which together with smoke, throw out sulphurous and carbonic gas in the air. The metallurgical enterprises, especially nonferrous metallurgies, fill the air with nitrogen compounds, chlorine, fluorine, ammonia, compounds of phosphorus, particles and compounds of mercury and arsenic, chemical and cement works, to name a few. Harmful gases get into the air as a result of the burning of fuel for the needs of the industry, heating of our homes, transportation needs and the burning and processing of household and industrial wastes.
Aerosols are the collective name of firm or liquid particles, which contaminate the air. Firm components of aerosols, in some cases, are especially dangerous to living creatures, because they are linked to the cause of specific diseases. In the atmosphere, aerosol pollution is perceived as smoke, fog, haze or fumes. Plenty of dust particles are also formed during the industrial activity of many businesses and people. .
The manufacture of cement and other building materials is also a source of dust pollution in the atmosphere. For these reasons, many people get sick and do not know the cause of their condition. Every person inhales the air and that air is contaminated. More than half of all Americans breathe polluted air, which can damage their health.
