The term "dry air" refers to atmospheric conditions where there is a low amount of moisture or humidity in the air. This means that the percentage of water vapor present in the atmosphere is below average, resulting in a comfortable and easy-to-breathe environment for most people. Dry air can occur naturally due to weather patterns or it may be caused by artificial methods such as heating or cooling systems that remove moisture from the air. While dry air isn't typically harmful, it can cause discomfort for some individuals and may lead to health issues such as dry skin, throat irritation, and respiratory problems in sensitive populations.