We plant new Posidonia oceanica meadows along the Mediterranean Sea coasts to safeguard the marine ecosystem.
Beneath the sand, Posidonia roots weave dense anchors that stabilise the seabed. The density of the plants slows the waves and absorbs their energy: less erosion, less sand lost, beaches that hold. Defending this ecosystem means defending the coastal communities and economies that live off the sea. And every restored meadow becomes an open-air classroom: with Worldrise we build education and awareness programmes that make people grasp how much depends on what happens below the surface.
Posidonia meadows are primary habitats of the Mediterranean: they host around 25% of the species in our sea. A single hectare can shelter 350 different species, resident or passing through - crustaceans, fish and other creatures vital to the sea's ecological and economic balance. Posidonia is no alga: it is a true plant, with ribbon leaves up to a metre long that capture carbon dioxide and release oxygen, storing it stably in the 'matte' of rhizomes and roots. For this role, UNESCO named it a World Heritage treasure.
The CO₂ estimate is per project, not per single tree. Method and technical values are in the project page, Transparency tab.