Building engineering physics addresses several different areas in building performance including: air movement, thermal performance, control of moisture, ambient energy, acoustics, light, climate and biology. This field employs creative ways of manipulating these principal aspects of a building's indoor and outdoor environments so that a more eco-friendly standard of living is obtained. Building engineering physics is unique from other established applied sciences or engineering professions as it combines the sciences of architecture, engineering and human biology and physiology. Building engineering physics not only addresses energy efficiency and building sustainability, but also a building's internal environment conditions that affect the comfort and performance levels of its occupants.