What is the process by which trees release water vapor from their leaves?

The process by which trees release water vapor from their leaves is known as transpiration. During transpiration, water absorbed by the roots of the tree moves through the plant and is released as vapor from small openings called stomata, located primarily on the underside of leaves. This process plays a vital role in the water cycle, as it helps to maintain moisture levels in the soil and the atmosphere.

Transpiration not only aids in nutrient transport within the plant but also contributes to cooling the plant and creating a negative pressure that helps draw more water upward from the roots. This process is essential for the health of the tree and is a critical component of ecosystem function, influencing local and regional climate by regulating humidity levels.