Välisõhus

Välisõhus refers to the Estonian term for outdoor air. It encompasses the ambient air that exists outside of buildings and enclosed spaces. This includes the atmosphere of natural environments such as forests, fields, and bodies of water, as well as the air in urban and industrialized areas. The quality of välisõhus is influenced by a multitude of factors, including natural processes like wind patterns, temperature fluctuations, and geological activity, as well as human activities such as transportation, industry, and agriculture.

The composition of välisõhus is primarily nitrogen and oxygen, with smaller amounts of argon, carbon dioxide, and trace gases. However, it can also contain various pollutants. These pollutants can originate from both natural sources, like volcanic eruptions or dust storms, and anthropogenic sources, such as emissions from vehicles, factories, and power plants. Common outdoor air pollutants include particulate matter, nitrogen oxides, sulfur dioxide, ozone, and carbon monoxide.

Monitoring and understanding välisõhus quality is crucial for public health and environmental protection. Poor välisõhus quality can lead to respiratory problems, cardiovascular diseases, and other adverse health effects. It also contributes to environmental issues like acid rain and climate change. Various governmental and scientific organizations track and report on välisõhus conditions to inform the public and guide policy decisions aimed at improving air quality.