Venice's salt marshes emerge as climate weapon against rising seas

The barene—salt marshes of vegetation and mud that fringe the Venetian lagoon—are proving far more effective at carbon sequestration than terrestrial forests, according to France 24's reporting this week. These wetlands absorb CO2 and lock it into the soil for the long term, making them a significant natural buffer against climate breakdown. Yet the very forces reshaping Europe's climate—rising sea levels and coastal erosion—are eroding these marshes at an accelerating rate, threatening both their ecological function and Venice's fragile equilibrium with the water that defines it.

The barene's carbon-storage capacity outpaces that of land forests, a distinction that places the lagoon's ecology at the centre of European climate strategy. As France 24 reported, the marshes' role in absorbing and storing carbon efficiently makes them a natural rampart against the effects of climate change. But the same rising seas and erosion patterns that have made Venice's survival a global symbol of climate vulnerability are now consuming the very wetlands that could help mitigate those effects. The lagoon faces a paradox: the natural systems best equipped to buffer it against climate stress are themselves under siege from the climate crisis.