The Green Guanabara Project, carried out by the NGO Guardiões do Mar, in partnership with the Mar Urbano Institute, and financed by OceanPact, promotes the restoration of mangroves and environmental education actions to disseminate good practices on ocean culture and the conservation of coastal ecosystems.

At the mangrove restoration stage, land preparation, planting and maintenance activities are carried out by the Fluminense Manguezal Cooperative, made up of artisanal fishermen and crab pickers. The actions developed in this effort were designed in line with the UN's Decade of the Oceans and the Decade of Restoration recommendations.