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good practice for having managed to perfectly combine mining activity with care for the environment. The quarry covers an area of 202.29 hectares and is located in the Garraf Natural Park (Barcelo- na). As for its fauna, species as peculiar as the peregrine falcon, the black wheatear, seabirds, the horseshoe snake, the snub-nosed viper, rock fauna and especially the Bonelli’s eagle (Aquila fascia- ta) have been detected in the area. The Bonelli’s eagle is, above all, the most important in the quarry. For 30 years, geologists, mining engineers and biologists from the quarry have ensured that it conti- nues to nest on the slopes of the southern face. They can be seen there every day, living in harmony with the industrial activity. Bonelli’s eagle that lives in the Vallcarca quarry. Biologists, geologists and mining engineers from the Ce- mentos Portland Valderrivas Group put all their efforts into the Vallcarca quarry, located in Sitges (Barcelona), not only to extract the raw material used in the manufac- ture of cement, but also because they know that they can do so in total balance with the biodiversity of the environ- ment. Proof of this is the pair of Bonelli’s eagles that live there and reproduce successfully every year, increasing the number of this species in the Garraf Natural Park. Bonelli’s eagles at the Vallcarca quarry in Sitges (Barcelona) B U S I N E S S B U S I N E S S 17 cement