The writer and environmental activist Gabi Martínez (Spain) is the author of nine books, including both novels and non-fiction. He is the Director of the Literatura Festival and won the 2022 Serondaya Prize, he is a founding member of the Caravana Negra Association in the defence of culture and nature, and of the Urban and Territorial Ecology Foundation. Furthermore, he is the Co-director of the Animales Invisibles project. His most recent book is Delta, a work that brings to light the reality of the Ebro Delta, which is returning to the sea: the Mediterranean advances on the land at a speed of about ten metres a year. Eduardo Romero García tells a powerful story that links the lives of an old man in Asturias, once a miner, with those of some Afro-Colombian women who reach Europe, and a group of Colombian migrants who flee their country and when they reach their destination they find ships that have brought coal from La Guajira, to a Spanish port. In conversation with Luz Helena Oviedo.