A treaty is only words until someone argues about it in front of a judge. This page is about what happens then: which courts hear environmental disputes, what they can settle, and the three problems that make environmental cases uniquely hard to decide.
📘 What you need to know
International judicial bodies resolve disputes, interpret treaties and ensure compliance with international environmental agreements.
The International Court of Justice (ICJ) is the principal judicial body of the UN and hears disputes between states.
The International Tribunal for the Law of the Sea (ITLOS) judges disputes under UNCLOS, the UN Convention on the Law of the Sea.
The European Court of Justice (ECJ) ensures uniform interpretation and application of EU law, including environmental directives.
Three challenges make environmental cases hard: evaluation of compensation, complexity, and enforcement.
Even a winning judgement can fail at the enforcement stage, through industry resistance or inadequate resources for monitoring.
The three courts to know
Three sources of law from 9.2 — treaties, a sea convention and regional directives — each with the court that interprets it.
1. International Court of Justice (ICJ)
Role: the principal judicial body of the United Nations. It hears cases involving disputes between states, including environmental ones.
Pulp Mills on the River Uruguay (Argentina v. Uruguay) addressed transboundary pollution concerns — a shared river, again.
The Corfu Channel Case (UK v. Albania) addressed state responsibility for environmental damage caused by naval mines.
2. International Tribunal for the Law of the Sea (ITLOS)
Role: a specialised tribunal judging disputes about the interpretation and application of the United Nations Convention on the Law of the Sea (UNCLOS).
Land Reclamation by Singapore in and around the Straits of Johor (Malaysia v. Singapore) addressed environmental concerns in maritime areas.
The Arctic Sunrise Case (Netherlands v. Russia) involved disputes over environmental protection in the Arctic.
3. European Court of Justice (ECJ)
Role: ensures the uniform interpretation and application of European Union law, including environmental directives and regulations. This is the enforcement half of the EU directives you met in 9.1.
EU Commission v. Portugal dealt with non-compliance with EU environmental legislation, specifically Portugal’s failure to comply with rules on the management, treatment and disposal of waste materials.
The Waste Framework Directive case (C-404/13) later clarified the concept of waste and how it applies under EU law.
Notice that second ECJ case. A court arguing about what the word “waste” legally means sounds trivial, but until that is settled nobody knows who the waste rules apply to. Interpreting a definition is environmental protection.
Why environmental cases are so hard to decide
Three challenges, three stages. If an exam question asks why environmental litigation is difficult, walk along this diagram.
Evaluation of compensation
Deciding appropriate compensation and damages for a breach of environmental law is genuinely difficult, because assessing the monetary value of environmental damage is not straightforward. Calculating what it costs to restore a polluted river to its original state, or to compensate communities for a lost livelihood, requires detailed scientific and economic analysis. Two experts can reach very different figures in good faith.
Complexity
Environmental cases mix intricate scientific, technical and legal issues, which makes fair judgements hard. Cases about climate change, biodiversity loss or toxic contamination need judges with an expert understanding of scientific concepts, technical data and legal precedent. Establishing whether industrial emissions are causing health impacts in a nearby community may depend on sophisticated, lengthy medical studies — which take years the affected community does not have.
Enforcement
Implementing judgements and securing compliance is complex, especially across multiple jurisdictions. Enforcing restrictions on deforestation in a transboundary forest requires neighbouring countries to cooperate and coordinate enforcement across borders. And even when a court rules in favour of environmental protection, the ruling can be blocked in practice by resistance from polluting industries or by inadequate resources for monitoring and enforcement.
🤔 Why valuing damage is not just an accounting problem
To award compensation, a court has to put a number on the harm. But what number? The cost of physically restoring the ecosystem? The income lost by fishing families? The value of a species that no longer exists anywhere? Each of these is a different figure resting on a different idea of what nature is for. An anthropocentric valuation counts human losses; an ecocentric one says the ecosystem had value regardless of who used it, and no payment restores that. So the compensation question is not a gap in the maths — it is a value judgement dressed as arithmetic, and that is exactly why courts find it so hard.
EXAM-STYLE
Outline the role of one international judicial body in environmental protection. [3]
Point 1 — what it is
The International Court of Justice is the principal judicial body of the United Nations.
Point 2 — what it does
It hears disputes between states, including environmental disputes, and so helps resolve conflicts, interpret treaties and ensure compliance with international agreements.
Point 3 — the example
In Pulp Mills on the River Uruguay (Argentina v. Uruguay) it addressed transboundary pollution of a shared river.
3 marks: identity, function, named caseAny of the three bodies works here. Pick the one whose case you remember most clearly.
EXAM-STYLE
Explain two challenges faced by courts hearing environmental cases. [4]
Challenge 1 — evaluating compensation
Assessing the monetary value of environmental damage is difficult, because there is no straightforward market price for a damaged ecosystem.
Consequence: calculating the cost of restoring a polluted river, or compensating communities for lost livelihoods, needs detailed scientific and economic analysis, and experts may reasonably disagree.Challenge 2 — enforcement
Implementing judgements is complex where multiple jurisdictions are involved, such as restricting deforestation in a transboundary forest.
Consequence: even a favourable ruling can fail if polluting industries resist it or if there are inadequate resources for monitoring and enforcement.4 marks: two challenges, each with a developed consequence
💡 Exam tip
Learn the three bodies with one case each. Two cases per court is more than you need.
Match court to law: ICJ for state disputes, ITLOS for UNCLOS and the sea, ECJ for EU directives.
Learn the three challenges as one phrase: compensation, complexity, enforcement.
Say what courts do: resolve disputes, interpret treaties, ensure compliance. The middle one is often missed.
Link enforcement back to 9.1 — industry resistance and inadequate funding are the same obstacles at a different level.
For compensation, mention that valuing damage depends on your environmental value system. That is a top-band connection.
⚠ Common mix-up
ICJ confused with the ECJ. The ICJ is a UN body for states; the ECJ interprets European Union law.
Assuming a court ruling ends the problem. Enforcement is a separate, often harder, stage.
Thinking courts only punish. Much of their work is interpreting what a treaty or a term such as “waste” actually means.
Describing complexity as just “it is complicated”. Be specific: scientific, technical and legal issues combined.
ITLOS described as a general environmental court. Its jurisdiction is UNCLOS and the law of the sea.
Naming a case with no detail. Add what the dispute was about in the same sentence.
Up next: Making Environmental Protection Stronger — a genuinely radical idea that gets round the “who can bring the case” problem entirely.
Want this explained one-to-one?
Book a free session with an experienced IB ESS tutor and get your trickiest topics made simple.
