Summary:
The Inter-American Court of Human Rights (IACtHR) ruled on 27 November 2023 that Peru is accountable for violating various rights of residents living near the La Oroya Metallurgical Complex (CMLO), established in 1992 in La Oroya. The CMLO, dedicated to smelting and refining metals such as lead, copper, zinc, and arsenic, caused severe environmental pollution, contaminating air, water, and soil, and adversely affecting residents’ health and well-being. Consequently, the Court mandated Peru to conduct an environmental contamination analysis, provide free medical care to affected individuals, and adjust pollutant standards, marking a significant victory for the plaintiffs after enduring years of pollution and inadequate governmental response.
Claim:
The residents of La Oroya brought claims against Peru, asserting that the government’s failure to regulate and address the environmental contamination from the smelting complex violated their fundamental human rights, including the right to a healthy environment, health, and life. They presented evidence of the adverse health effects experienced due to exposure to toxic pollutants emitted by the complex.
Decision:
On 27 November 2023, the IACtHR declared Peru responsible for multiple human rights violations affecting the inhabitants of La Oroya. These violations are rooted in the contamination of the air, water, and soil caused by mining-metallurgical activities in the CMLO. The State’s failure to regulate and supervise these activities exacerbated the situation, leading to violations of the rights to a healthy environment, health, life, and personal integrity of the victims. Furthermore, the Court found that the State failed to fulfil its obligation of progressive development concerning the right to a healthy environment by regressing air quality standards.
The Court also determined that the State neglected children’s rights by not implementing adequate protection measures, considering the disproportionate impact of contamination on the children of La Oroya. It emphasized the critical connection between safeguarding children and addressing the climate crisis, noting that mining and industrial activities, particularly those involving fossil fuels, are significant contributors to greenhouse gas emissions, posing risks to public health and exacerbating climate change. It further acknowledged the vulnerability of children to the impacts of climate change and the long-term consequences they face, as underscored by the United Nations Committee on the Rights of the Child in the Sacchi case. Consequently, the Court asserted that states have a duty to protect children and must take decisive action to mitigate health risks from pollutant emissions that exacerbate climate change crisis.
Moreover, the Court concluded that the State violated the right to public participation and adequate information provision to the victims regarding measures affecting their rights. Additionally, it found the State in violation of the right to judicial protection by failing to comply with a decision of the Constitutional Court for the protection of La Oroya’s inhabitants, which was delivered in 2006.
Finally, the Court held the State accountable for not investigating reported acts of harassment, threats, and reprisals against some victims. Based on these findings, the Court determined that the State of Peru violated several articles of the American Convention on Human Rights, specifically articles 26, 5, 4.1, 8.1, 13, 19, 23, and 25, in relation to articles 1.1 and 2 of the same instrument
Peru was ordered to conduct a comprehensive study assessing contamination in air, water, and soil in La Oroya and to develop an environmental remediation plan accordingly. Furthermore, Peru was ordered to provide free medical care to victims and compensate them individually with amounts ranging between $15,000 and $30,000. This decision emphasizes states’ obligation to safeguard the right to a healthy environment and hold them accountable for environmental harm threatening their citizens’ well-being.
Environmental protection as jus cogens:
In para. 129 of its ruling, the Court made a novel finding: it held that the obligation to protect the environment should be a jus cogens norm. The paragraph in question is translated here in full:
“States have recognised the right to a healthy environment, which carries with it an obligation of protection that is incumbent on the international community as a whole. It is difficult to imagine international obligations of greater significance than those that protect the environment against unlawful or arbitrary conduct that causes serious, extensive, long-lasting and irreversible damage to the environment in a scenario of climate crisis that threatens the survival of species. In view of the above, international protection of the environment requires progressive recognition of the prohibition of this type of conduct as a peremptory norm (jus cogens) that gains the recognition of the international community as a whole as a norm from which no derogation is permitted. This Court has pointed out the importance of the legal expressions of the International Community whose higher universal value is indispensable to guarantee essential or fundamental values. In this sense, guaranteeing the interest of both present and future generations and the preservation of the environment against its radical degradation is fundamental for the survival of humanity.” (para. 129 of the judgment, translated by climaterightsdatabase.com, references removed).
Links:
The case documents are accessible below for download:
Status of the case:
Decided.
Further reading:
For further information and analysis of the case, see among others:
- José Saldaña, ‘People from La Oroya vs Peru, Inter-American Court of Human Rights: How Effective is International Law to Protect the Environment in Extractive Contexts?’, EJIL:Talk Blog, 11 April 2024, available here.
- Patricio Trincado Vera, ‘The Right to a Healthy Environment in La Oroya v. Peru: A Landmark Judgement of the IACtHR’, OpinioJuris Blog, 25 May 2024, available here.
Suggested citation:
Inhabitants of La Oroya v Peru (Preliminary Exceptions, Merits, Reparations and Costs), Judgment of November 27, 2023, Inter-Am Ct HR, Series C No 511.
Last updated:
25 March 2024.