The court outlined a series of legal standards, including the recognition of a human right to a healthy climate, the obligation to prevent massive and irreversible environmental harm as well as the duty to protect the rights of current and future generations.
“The Court has declared that we are in a climate emergency that is undermining the human rights of present and future generations and that human rights must be at the center of any effective response," Nikki Reisch, program director at the Center for International Environmental Law Climate and Energy, told The Associated Press.
The opinion said states have a legal duty not only to avoid environmental harm but also to protect and restore ecosystems, guided by science and Indigenous knowledge.
“This is a historic opinion,” said Reisch. “It’s not just a legal milestone — it’s a blueprint for action. This opinion will guide climate litigation at the local, regional, and national courts, and provide a foundation for climate policymaking, grounding local legislation and global negotiations in legal obligation, not just in the Americas but around the world.”
Though not binding, the court's opinions carry legal weight in many member countries of the Organization of American States and often influence domestic legislation, judicial rulings and international advocacy. The court's findings are expected to bolster climate-related lawsuits and human rights claims in the region, and to influence negotiations ahead of COP30 — the next major United Nations climate summit, set to take place in November in Belem, Brazil.
“States must not only refrain from causing significant environmental damage but have the positive obligation to take measures to guarantee the protection, restoration, and regeneration of ecosystems,” said Court President Judge Nancy Hernández López.
“Causing massive and irreversible environmental harm...alters the conditions for a healthy life on Earth to such an extent that it creates consequences of existential proportions. Therefore, it demands universal and effective legal responses,” López said.
The opinion comes amid growing Indigenous momentum in the region, including a summit in Ecuador's Amazon last month where hundreds of Indigenous leaders gathered to demand enforcement of court victories recognizing their land and environmental rights.
The Inter-American Court of Human Rights, based in San Jose, Costa Rica, is the region’s top tribunal for interpreting and enforcing the American Convention on Human Rights. Its rulings, though often challenged by weak enforcement, have played a key role in advancing Indigenous rights and environmental protections across Latin America.
In recent years, the court has condemned governments for allowing mining projects on Indigenous land without proper consultation, and advocates have increasingly turned to it as a forum for climate-related accountability.
The advisory builds on the Court’s 2017 advisory ruling that recognized the right to a healthy environment as a standalone human right, deepening its application in the context of climate breakdown.
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Credit: AP
Credit: AP
Credit: AP
Credit: AP