Why can forests play a role in regulating climate?

Plants on the earth can absorb about 86.5 billion tons of carbon dioxide gas a year, which is an unparalleled "air purifier". Forests can conserve water and play an important role in the natural circulation of water. "Green mountains are always there, and green water is always flowing." Trees are always associated with water. Part of the falling rain was intercepted by the canopy, and most of it fell into the litter under the tree and was stored in the loose and porous forest soil. Part of it is absorbed by the roots of plants in the forest, and part of it is returned to the atmosphere by evaporation. 1 hectare of forest can evaporate 8000 tons of water a year, which makes the air in the forest area moist, increases precipitation, and makes it warm in winter and cool in summer, thus playing a role in regulating climate.