A greenhouse’s interior climate is far from balanced. Temperatures, degrees of humidity and levels of CO2 all vary. These variations can influence returns and quality, whether you’re growing vegetables, potted plants, cut flowers or other crops. Air recirculation ensures that the air flow in the greenhouse remains at a constant and even level; it equalizes the greenhouse climate. As a result of this air movement, the leaf dries faster and is better able to remove its moisture. This gives molds less chance to develop.