What is it called when plants give off water vapor as a waste product?

This process is called transpiration. Transpiration involves the loss of water vapor from the stomata, which are tiny openings on the surface of leaves. Water is taken up by the roots from the soil and transported through the plant to the leaves, where it is released into the air as vapor.

Transpiration serves several important functions for plants. It helps to cool the plant by allowing water to evaporate from its leaves, which can help regulate temperature and prevent overheating. Transpiration also helps to transport nutrients and minerals from the soil to different parts of the plant, as water is needed for the process of photosynthesis.

While transpiration is essential for the survival of plants, it can also lead to water loss. Plants must balance the need for water uptake and transpiration in order to prevent wilting and dehydration. Factors such as temperature, humidity, and wind speed can all affect the rate of transpiration in plants.