How artificial salt marshes can help in the fight against rising seas

Made from Crossrail clay, Europe’s biggest coastal habitat restoration project is a valuable flood defence but is itself threatened by climate changeIt is the third hottest day on record in the UK and the cool saline mud oozing through my toes provides welcome relief from the beating sun. I am standing barefoot in a shallow pool in Europe’s largest coastal habitat restoration project, Wallasea Island in Essex. The 670-hectare (1,656-acre) expanse of salt marshes, lagoons and mudflats