What is the surrounding air?
The surrounding air is the outdoor air in which people and other organisms live and breathe. Its content and quality are directly influenced by people's daily activities. The quality of the ambient air has a direct influence on public health and the well -being of the country's ecosystems.
Air usually has no color, odor or taste. It is a mixture of gases, especially nitrogen, about 78%, and oxygen, about 21%, with the remaining 1%consisting of carbon dioxide, methane, hydrogen, argon and helium. Human activities, such as the production and burning of fossil fuels, cause changes in the chemical composition of the ambient air by releasing chemical and industrial pollutants into the atmosphere.
pollutants can include gases or particles, which are small particles of dust, smoke, ash, pollen or other substances. It has been found that many pollutants of air substances are harmful to both the environment and human health. Pollutants that are known to have adverse effects on the health of the area.Substances . The pollutants of the criteria include ozone, lead, carbon monoxide, nitrogen dioxide, sulfur dioxide and particles. These include infants, children, older and people with cardiopulmonary conditions. In children, it has been shown to increase the risk of airway infections and worsen the severity of asthma attacks. In adults, the exposure to particle matter is associated with an increased risk of hospitalization and death due to cardiovascular disease.
In the environment, changes in the surrounding air contribute to the development of acid rain and greenhouse effect, capture sunlight in the Earth's atmosphere due to the presence of carbon dioxide, methane and other gases. Air pollution also contributes to the exhaustion of the ozone layer, an area of atmosphere that protects Earth from harmful ultraviolet radiation.
To combat the harmful effects of pollution of the ambient airDardy air quality throughout the industrial world. The Clean Air Act, which was first adopted in the United States in 1970, required the environment for environmental protection to set national standards of air quality in the vicinity of pollutants. These standards are designed to protect public health, ensure the well -being of animals and crops, and protect the health of the Earth's ecosystems.