Floor heating is called floor radiant heating. It refers to laying a layer of heating material under the floor or floor tiles, etc., by heating the floor or floor tiles and other ground decoration materials, and transmits heat to the indoor to achieve the heating effect. Since the heat transferred by floor heating is mainly in the form of radiation, the full name is floor radiant heating, or floor heating for short.
Wetland in the narrow sense refers to an area where the surface is too wet or where water often accumulates, and wetland organisms grow. Wetland ecosystem is a unified whole composed of wetland plants, animals, microorganisms and their environment that inhabit wetlands. Wetlands have multiple functions: protecting biodiversity, regulating runoff, improving water quality, regulating microclimate, providing food and industrial raw materials, and providing tourism resources.
On March 11, 2021, the "Bulletin on China's Land Greening Status in 2020" released by the Office of the National Greening Committee showed that the national wetland protection rate reached more than 50% in 2020.