Sergi stands atop a wooden tower from where he can see almost the entire Llobregat Delta. However, he never takes his eyes off the binoculars he wears around his neck, which he uses to inspect the area. He joined the Rural Agents less than three years ago, and one of his tasks is to monitor this area, declared a natural interest site near El Prat Airport.

Doctor in biology, Joan Pino, director of the Centre de Recerca Ecològica i Aplicacions Forestals (CREAF), explains that the expansion of El Prat airport above the protected natural area of La Ricarda, as envisaged in the draft project presented by Aena, would have significant negative impacts on the biodiversity of the Llobregat delta and the health of the residents of nearby towns. All this, in a climate emergency scenario.