In 2025, Grupo Ecológico de Cascais organised a new edition of Clean Up the Med in the Areia, Birre and Aldeia de Juso woodlands. Members of the association and local residents took an active part.

Clean Up the Med is an international environmental volunteering campaign dedicated to cleaning beaches and coastal areas. Each year, the GEC chooses an area of the municipality of Cascais where litter collection can go hand in hand with environmental awareness and direct contact with the community.

In the same year, the GEC also organised a Clean Up the World action along the Ribeira das Vinhas stream, extending this work of caring for the land to the interior of the municipality.

These actions remove litter from natural areas, but they also play an educational role: they bring citizens together, make environmental problems visible and create opportunities for ongoing participation.