Read the full story from Climate Central.
Centuries of dredging, diking and development have replaced wetlands throughout the U.S. with more than 10,000 miles of rocks, concrete and metal. For every seven miles of coastline in the Lower 48, scientists in North Carolina calculated that about one mile is hardened with a seawall, bulkhead or other hard structure to protect land and property.
Rising costs from flooding and erosion are prompting Americans, military bases and government agencies to opt for more natural alternatives. State and federal governments are changing permitting rules and taking other steps to encourage the switch, which can improve water quality, support fisheries and protect against storms and rising seas.