Explain from a physical point of view: Why can wetlands adjust the climate?

The higher the temperature, the higher the proportion of dissolved air or water molecules. In this way, when the temperature drops, the proportion of water molecules will decrease, and water molecules will condense, which will release heat and raise the temperature; On the contrary, when the temperature rises, the wetland will produce water molecules to meet the requirements of the proportion of water molecules in the air, and the generated water molecules will absorb heat and reduce the temperature. Such ups and downs will adjust the climate of wetlands.