Salt marshes fringe much of the world’s low-lying coasts. They act as a first line of defence against storm surge waves, reducing storm water levels and the run up of waves on landward sea defences. As a result, vulnerable shorelines and engineered coastal defences are at lower risk of suffering under the impact of climate change, for example through sea level rise and intense storms. Little is known, however, of the resistance of these natural buffers to the continued battering by waves and tides and even less is known about what kind of storm it takes to erode these protective fringes, and thus leaving the coast and the populations living alongside it considerably more vulnerable. This short film is the second in a series in which a team of Geographers and Geologists explains how they are planning to shed light on what makes salt marshes resistant to storm waves (Film 1: • Determining the resistance of coastal... ) and then (Film 2: this film) how their use of the latest remote sensing and soil scanning technologies alongside one of the world’s largest indoor wave flumes, has allowed them to gather the evidence for just how resistant salt marshes are to storm impacts. We are grateful to Cambridge Filmworks for producing this film with us and to Clare Sydney, Trinity College Dublin, for editing the subtitles for us. The voiceover was provided by Julia Lee (https://www.voicesuk.co.uk/artist/jul...)