A wetland is an area of land that is often or always covered with shallow water, like a marsh or swamp.
“Wetland” combines “wet” and “land” to name land areas that are saturated with water. The term became common in environmental science in the 20th century.
Wetlands act like giant natural sponges, soaking up floodwater and slowly releasing it. They’re also nurseries for many species, making them some of the most biologically rich places on Earth.
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