In the process of transpiration, the excess water absorbed by the plant roots is released through the evapotranspiration.
If there are more plants in the environment, more water is released in the process of transpiration. The higher the aerial part of the plant, the higher the transpiration. Again, if the number of leaves in the plant is more, the amount of water vapor released is more. The higher the ambient temperature, the higher the rate of perspiration. This release of water increases the amount of water vapor in the atmosphere. Water particles increase in the atmosphere. Water vapor condenses to form water particles. The environment becomes cold. Water particles combine to form clouds and cause precipitation. As a result, the temperature of the environment decreases. Thus the process of respiration regulates the temperature of the environment.