The process by which water leaves a plant and enters the atmosphere is known as transpiration. This occurs mainly through small openings called stomata on the leaf surface. As water evaporates from the leaf, it creates a negative pressure that pulls more water up from the roots through the plant’s xylem. Transpiration plays a critical role in water regulation, nutrient transport, and maintaining plant health. It also contributes to the water cycle, affecting local climates and weather patterns.