Mountain air refers to the fresh, clean air found at higher elevations, typically in mountainous regions. This air is often cooler and less humid than air at lower altitudes, which can make it feel refreshing. The lower concentration of pollutants and higher oxygen levels contribute to its crisp quality, making it invigorating for those who visit these areas. The unique composition of mountain air is influenced by factors such as altitude, vegetation, and weather patterns. Trees and plants in these regions can also affect air quality by releasing oxygen and absorbing carbon dioxide. Many people seek out mountain air for recreational activities like hiking and skiing, appreciating its health benefits and natural beauty.