As early as the Renaissance, the twelve zodiac signs were divided among four element signs with three signs associated with each element. Together they form the natural world, so each element in some way depend on each other.
The Element of Air is attached to the zodiac signs Gemini, Libra and Aquarius.
This is the element that connects all other elements, it opens our lungs, gives us room to breathe, and opens our soul to freedom. People born under this sign may have a problem with the regular order of their surroundings therefore their main goal is to stop worrying about others opinions or pleasing others, and just follow their own liberating ideas. People of Air signs are balanced by the element of Earth, needing a healthy routine and physical activity to remain aware of their physical existence.