Wetlands -- land areas that have been saturated by water long enough to support aquatic plants -- help control floods, filter pollutants, and provide habitats for diverse aquatic species and other creatures. In the marshes of Ohio's Cuyahoga Valley National Park, beaver, muskrats and river otte...
Wetlands -- land areas that have been saturated by water long enough to support aquatic plants -- help control floods, filter pollutants, and provide habitats for diverse aquatic species and other creatures. In the marshes of Ohio's Cuyahoga Valley National Park, beaver, muskrats and river otte...
Wetlands -- land areas that have been saturated by water long enough to support aquatic plants -- help control floods, filter pollutants, and provide habitats for diverse aquatic species and other creatures. In the marshes of Ohio's Cuyahoga Valley National Park, beaver, muskrats and river otte...