Salt marshes fringe much of the world’s low-lying coasts and they provide the perfect natural defence to the battering of the sea and increasing storm surges as a result of climate change and rising sea levels. A day doesn’t seem to go by without news of a further crumbling of the coastline so I thought it would be a great idea to talk to Dr. Ben Evans who is a coastal geomorphologist at the University of Cambridge with a particular interest in coastal wetlands and salt marshes.