…This amicus brief…directed to the:::[Hon. Magistrate]…Ibarra… [Administrative] Tribunal …Cundinamarca…[Plaintiff Administrative Affairs –Judicial Procurator’s Office vs.]… Carbones del Cerrejón Limited…[and others]. The issues that arise on the facts of this case appear to the authors of this brief to be… (a) The collective right to the enjoyment of a healthy environment; (b) The right to safe working conditions and a safe working environment (with particular reference to environmental pollution; protection from hazardous chemicals, such as carcinogens; and environmental noise); (c) The safeguards that should be provided by a system of occupational health to workers, and .more generally…These issues are analysed, below, in relation to…core international instruments…the Inter-American system; and…some further examples from jurisprudence, including in relation to other regional treaty instruments...