WETLANDS

•A wetland is a place where plants grow in soil or mud that is soaked with water. There are many different types of wetlands, from mangrove swamps to bogs and marshes.
•It can be found anyplace where the conditions are right, from the Arctic to the equator. Wetlands are often small areas dotted within other biomes. Some are as big as a whole country.
•Shallow-water wetlands full of trees is called a swamp.
•Ones with only small plants (reeds) are called marsh.
•In cold rainy places a type of wetland called a bog making the ground wet and spongy.
•Rivers and lakes are not wetlands, might be wetlands around edges and can occur next to the sea.
•Wetlands are important for wildlife. They purify our water, help stop floods, and protect coastlines against erosion.
•Most of the water comes from rain.
•Sometimes developed in the middle of deserts because some big wetlands stay wet because rain falls on distant mountains and flows along rivers or underground sometimes.
•Many grow and shrink with the seasons
•To survive, animals and plants have to be able to cope with theses massive changes year after year.

HOW DO WETLANDS PURIFY WATER??