The decision delivers historic protections that strengthen the responsibilities of states under international law beyond the Paris Agreement, with several key additional obligations including the duty of all countries to prevent significant harm to the environment and the duty to cooperate.

The court’s decision obligates states to regulate businesses on the harm caused by their emissions regardless of where the harm takes place. Significantly, the court found that the right to a clean, healthy and sustainable environment is fundamental for all other human rights, and that intergenerational equity should guide the interpretation of all climate obligations.

Danilo Garrido, legal counsel at Greenpeace International, said: “This is the start of a new era of climate accountability at a global level. The ICJ advisory opinion marks a turning point for climate justice, as it has clarified, once and for all, the international climate obligations of States, and most importantly, the consequences for breaches of these obligations. This will open the door for new cases, and hopefully bring justice to those, who despite having contributed the least to climate change, are already suffering its most severe consequences. The message of the court is clear: the production, consumption and granting of licenses and subsidies for fossil fuels could be breaches of International Law. Polluters must stop emitting and must pay for the harms they have caused.”

The decision also clarifies that breaches of climate obligations give rise to full reparations: including stopping harmful actions, and giving financial compensation for any related losses and damages. These can include compensation for climate harm and even the need for an immediate cessation of GHG emissions above a science-based safety threshold. Most significantly, the court made important findings that will ensure climate justice for future generations in the most climate-impacted communities, offering a historic level of protection.

Earlier this month, the Inter-American Court of Human Rights delivered another historic decision on the obligations of states in the face of the climate emergency. The court established that governments must take “urgent and effective actions” to safeguard the right to a healthy climate, and that companies have obligations with regard to climate change and its impacts on human rights. This decision unequivocally puts the rights of people and nature above the interests of polluters.