An ordinary law can be repealed by the next government. A constitutional right cannot — not easily. That is why some countries have written environmental protection into their constitutions, and why it changes what citizens can actually demand from the state.
📘 What you need to know
Environmental constitutionalism is the inclusion of environmental principles, rights and responsibilities in a nation’s constitution.
It means the constitution recognises the importance of protecting the environment and gives citizens the right to a healthy environment.
There is a growing international trend of nations writing environmental rights and duties into their constitutions, especially over climate change.
India: provisions for environmental protection, recognising the duty of citizens to protect and improve the natural environment.
Ecuador (2008): one of the first in the world to recognise the rights of nature, granting ecosystems legal rights to exist, regenerate and evolve.
South Africa (1996): the right to a healthy environment as a basic human right, plus a duty on the state to protect and preserve it.
A constitutional right still fails without clear definitions and working enforcement.
What environmental constitutionalism means
DefinitionEnvironmental constitutionalism = environmental principles, rights and responsibilities written into a nation’s constitution
A constitution is the highest layer of a country’s law. Putting environmental protection there does two things that an ordinary act of parliament cannot. It makes the commitment hard to reverse, because changing a constitution normally needs a special majority rather than a simple vote. And it gives citizens something to take to court: a right they hold, rather than a policy they hope the government keeps.
Internationally, more countries are addressing environmental issues through their constitutions, particularly on climate change. The interesting part is that they have not all done it the same way.
Three different answers to one question
The question is: who holds the right? Each of the three examples gives a different answer, and that difference is a direct link back to environmental value systems.
This is environmental value systems appearing in real law. Ecuador’s approach is ecocentric; South Africa’s is anthropocentric; India’s frames it as a citizen duty rather than a right at all.
🤔 Why “rights of nature” is such a big change
In almost every legal system, nature is property. A river is something someone owns or uses, so to defend it in court you have to show that you were harmed. That works when a factory poisons your drinking water. It fails when a remote wetland is destroyed and no human can show a personal loss. Ecuador’s constitution changes the question from “who was harmed?” to “was the ecosystem’s own right to exist and regenerate violated?” — which means someone can go to court on behalf of the ecosystem itself. That is why it has influenced environmental discourse globally, and it is a strong point to make in an evaluation.
Case study: Article 24 in South Africa
The Constitution of the Republic of South Africa, adopted in 1996, contains Article 24, which guarantees citizens the right to an environment that is not harmful to their health and well-being. It treats a healthy environment as a basic human right rather than a policy goal.
What it obliges the state to do
Article 24 does more than protect an individual right. It places a duty on the state to take reasonable legislative measures to protect and improve the environment. In practice that means forming and implementing environmental policies and regulations aimed at reducing environmental degradation and promoting sustainable development. The right creates the obligation; the obligation creates the laws.
Notice this is the same enforcement-and-funding argument from 9.1, one level higher up. Constitutions do not escape it.
The impact on governance
Recognising environmental rights in the constitution has had a real effect on environmental governance in South Africa. It has driven the development of strong environmental laws and policies covering air and water quality, biodiversity conservation, waste management and land use planning. The constitutional right became the anchor that later legislation was built on.
The challenges
UNCLEAR DEFINITIONS
A lack of clarity in defining what counts as “sufficient water” has caused uncertainty
Without a clear standard, it is difficult to set rules for water allocation
A right that cannot be measured is hard to enforce in court
WEAK ENFORCEMENT
Inadequate enforcement mechanisms lead to violations of the right to water
This falls hardest on rural and marginalised communities
The result is poor provision of water and sanitation services to exactly the citizens the right was meant to protect
Note the injustice pattern repeating. A constitutional right exists for everyone, but the people who cannot enforce it are the rural and marginalised. That is environmental justice from 9.1 showing up inside a country’s own constitution.
If a question asks you to evaluate environmental constitutionalism, this case gives you both halves in one example: South Africa proves that a constitutional right can drive strong laws, and it proves that a right without clear standards and enforcement still leaves people without water.
EXAM-STYLE
Outline what is meant by environmental constitutionalism, using one example. [3]
Point 1 — definition
Environmental constitutionalism is the inclusion of environmental principles, rights and responsibilities in a nation’s constitution.
Point 2 — what it guarantees
It means the constitution recognises the importance of protecting the environment and gives citizens a right to a healthy environment.
Point 3 — the example
South Africa’s 1996 constitution includes Article 24, guaranteeing an environment that is not harmful to health and well-being, and placing a duty on the state to take reasonable legislative measures to protect it.
3 marks: definition, what it gives citizens, named constitution with detailThe state duty is the detail that separates a full answer from a half one.
EXAM-STYLE
Evaluate the effectiveness of including environmental rights in a constitution. [6]
Strengths
A constitutional right is difficult to reverse, so protection survives changes of government. It creates a legal duty on the state, which drives further legislation — South Africa’s Article 24 led to strong laws on air and water quality, biodiversity, waste and land use. It also lets citizens challenge the state in court.
Extending the idea
Ecuador’s 2008 constitution goes further by granting ecosystems themselves legal rights to exist, regenerate and evolve, so nature can be defended even where no individual can show personal harm.
Weaknesses
Vague wording undermines it: South Africa’s failure to define “sufficient water” has made allocation standards unclear. Enforcement mechanisms remain inadequate, so the right to water is still violated in rural and marginalised communities.
Judgement
Constitutional rights are effective at setting direction and creating obligations, but they only deliver outcomes when the terms are clearly defined and enforcement is properly resourced. Necessary, but not sufficient on their own.
6 marks: strengths, a second example, weaknesses, justified conclusion
💡 Exam tip
Learn the three countries as a set: India (duty on citizens), Ecuador 2008 (rights of nature), South Africa 1996 (right to a healthy environment).
Quote Article 24 and the year 1996. Named detail is the difference between bands.
Say the constitution creates a duty on the state, not just a right for individuals.
Link Ecuador to ecocentric value systems and South Africa to anthropocentric ones. That connection is exactly what HL rewards.
Always give the limitation: unclear definitions and weak enforcement. A one-sided answer caps low.
Use the phrase “hard to reverse” to explain why constitutional protection differs from ordinary legislation.
⚠ Common mix-up
Constitution confused with ordinary legislation. A constitution sits above normal law and is much harder to change.
Ecuador’s approach described as “protecting people”. It grants rights to nature itself, which is the whole innovation.
Assuming a constitutional right guarantees an outcome. South Africa shows it does not without enforcement.
India described as granting a right. Its provisions frame environmental protection as a duty of citizens.
Forgetting the state duty. Article 24 obliges the state to act, not just to refrain from harm.
Writing about the environment only. The South African challenges are about water access for marginalised people — a justice issue.
Up next: Local, National and International Law — the three levels environmental law operates at, and what each one can and cannot do.
Want this explained one-to-one?
Book a free session with an experienced IB ESS tutor and get your trickiest topics made simple.
