The light pollution generated by Christmas lighting in Madrid is less than that produced by sports fields. Researchers from the GUAIX-UCM group, with the support of the Sky Protection Group, have taken new images from space to detect Christmas ornamental lighting, measure it directly and assess its environmental impact. The extraordinary lighting of the Real Jardín Botánico de Madrid, the cono de Sol and the large dynamic lighting ball at the junction between Alcalá and Gran Vía stand out as having the greatest and most undesirable environmental impact.

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