The CST has offered its services to entities, platforms, or groups defending the territory, particularly in the preparation of technical reports. Some examples include:

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• Meandre Vall del Llémena: A non-profit organization dedicated to environmental education.

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• Salvem les Valls (Save the Valleys): An environmental group from La Garrotxa formed in response to the socioecological conflict triggered by the construction of the Bracons tunnels (a road infrastructure connecting Osona with La Garrotxa) and, more recently, the construction project for the Olot bypass. Both cases have a significant impact on the Vall d'en Bas area.

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• SOS Costa Brava: A non-profit federation that brings together over 25 organizations working to halt urban development and infrastructure projects on the Costa Brava. 

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• Plataform Stop the industrial region of Les Llosses road: Part of the Grup de Defensa del Ter, aimed at stopping the construction of a new industrial park in the Ripollès region, specifically on the road to les Llosses. The platform advocates for valuing the agricultural or floodplain areas of Ripollès as a natural and ethnological heritage, which is scarce due to urban pressure in recent decades.

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• SOS Pyrenees: A platform uniting various territorial defense entities located in mountain regions near the Pyrenees, highlighting threats to the environment and the conditions and ways of life in this area.

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• Plataform Save the Montsacopa Volcano. Protect the Morrots: Residents of Olot who oppose the construction of 46 new homes at the base of the Montsacopa volcano.