# Article 191 TFEU Explained: EU Environment Policy and Its Principles
URL: https://eu-now.com/blog/article-191-tfeu-environment-policy-explained
Published: 2026-09-06 · Updated: 2026-09-06
Category: Guides
Tags: TFEU, Article 191, Article 192, environment, precautionary principle, polluter pays, EU Knowledge, EPSO
The four objectives, the four principles — precaution, prevention, rectification at source, polluter pays — and the level-of-protection wording EPSO builds EU Knowledge questions from.
## Key takeaways
- Article 191(1) sets four objectives: preserving, protecting and improving the quality of the environment; protecting human health; prudent and rational utilisation of natural resources; and promoting international measures, in particular combating climate change
- Article 191(2) names four principles — precautionary, preventive action, rectification at source, and polluter pays — and requires a HIGH level of protection, not the highest
- Article 191(3) obliges the Union to take account of scientific data, regional conditions, the benefits and costs of action or lack of action, and balanced economic and social development
- Article 191 states the aims; Article 192 supplies the procedure — ordinary legislative procedure as the rule, with a special legislative procedure and unanimity for fiscal measures, town and country planning, land use and the choice of energy sources
Article 191 TFEU is a short article that carries an unusual amount of examinable material: two lists that must be recited exactly, one adjective that is routinely upgraded by distractors, and a division of labour with Article 192 that decides the answer to every "which procedure" question in this policy area.

It sits in our TFEU series next to [Article 107 (State aid)](/blog/article-107-tfeu-state-aid-explained), [Article 288 (legal acts)](/blog/article-288-tfeu-legal-acts-explained) and [Article 294 (ordinary legislative procedure)](/blog/article-294-tfeu-ordinary-legislative-procedure-explained), and it feeds the [EPSO EU Knowledge test](/test/eu_knowledge).

## The four objectives

Union policy on the environment shall contribute to pursuit of the following objectives:

- **preserving, protecting and improving the quality of the environment**;
- **protecting human health**;
- **prudent and rational utilisation of natural resources**;
- **promoting measures at international level** to deal with regional or worldwide environmental problems, **and in particular combating climate change**.

Two details are worth holding. Human health is an objective of *environment* policy, not only of health policy — an option that files it elsewhere is testing whether you have read the article. And combating climate change is named explicitly in the fourth objective, added by Lisbon; a question dated to the current Treaty framework that treats climate as absent from Article 191 is out of date.

## The four principles

Union policy on the environment **shall aim at a high level of protection taking into account the diversity of situations in the various regions of the Union**. It is based on:

1. the **precautionary principle**;
2. the principle that **preventive action should be taken**;
3. the principle that **environmental damage should as a priority be rectified at source**;
4. the principle that **the polluter should pay**.

Four, and only these four. Sustainable development, proportionality, subsidiarity and integration are all real principles of EU law that appear elsewhere in the Treaties — which is exactly why they make convincing distractors here.

**"A high level of protection", not the highest.** And the qualifier travels with it: taking into account the diversity of situations in the various regions of the Union. Options that upgrade the adjective or strip the qualifier are the most common single error on this article.

The paragraph closes with the harmonisation safeguard clause: harmonisation measures answering environmental protection requirements shall, where appropriate, include a **safeguard clause** allowing Member States to take provisional measures for non-economic environmental reasons, subject to a Union inspection procedure.

## Precaution is not prevention

The two are routinely swapped, and the difference is about evidence.

**Preventive action** applies where the risk is known and understood: you act before the harm occurs because you can see it coming.

**The precautionary principle** applies where the science is not settled: where there are reasonable grounds to fear serious or irreversible harm, the lack of full scientific certainty is not a reason to postpone protective measures. It is a decision rule for uncertainty, and that is its whole point.

An item that defines precaution as "acting to prevent known risks" has quietly written prevention into the precautionary slot.

## What Article 191(3) makes the Union weigh

In preparing its policy, the Union shall take account of:

- **available scientific and technical data**;
- **environmental conditions in the various regions** of the Union;
- the **potential benefits and costs of action or lack of action**;
- the **economic and social development of the Union as a whole** and the balanced development of its regions.

The third item is the one worth remembering: the Treaty explicitly requires weighing the cost of *inaction*, not only the cost of acting.

Article 191(4) then covers cooperation with third countries and competent international organisations, while preserving the competence of Member States to negotiate in international bodies and conclude international agreements.

## Article 192 decides the procedure

Article 191 states the aims. It creates no legislative procedure of its own — that is Article 192, and the split is examinable.

**The rule.** The European Parliament and the Council, acting in accordance with the **ordinary legislative procedure** and after consulting the Economic and Social Committee and the Committee of the Regions, decide what action is to be taken.

**The exception.** By way of derogation, the Council acting **unanimously** in accordance with a **special legislative procedure**, and after consulting Parliament and the two committees, adopts:

- provisions **primarily of a fiscal nature**;
- measures affecting **town and country planning**, **quantitative management of water resources** or affecting, directly or indirectly, the **availability of those resources**, and **land use** (with the exception of waste management);
- measures **significantly affecting a Member State's choice between different energy sources** and the general structure of its energy supply.

If you can only keep one thing from Article 192, keep that third bullet: it is why energy-mix decisions remain national even inside an area of shared competence.

## How this is tested

The four recurring shapes are a list item that substitutes one principle for a plausible outsider; a wording item that upgrades "high" to "highest" or drops regional diversity; a precaution-versus-prevention definition swap; and a procedure item that puts a fiscal environmental measure through the ordinary procedure instead of unanimity.

Practise the pattern in our [free EU Knowledge tests](/test/eu_knowledge), with explanations that cite the article behind each answer, and see [what to study for EU Knowledge](/blog/epso-eu-knowledge-test-what-to-study) for the full syllabus.
## FAQ
### What are the four principles in Article 191(2)?
Union policy on the environment is based on the precautionary principle and on the principles that preventive action should be taken, that environmental damage should as a priority be rectified at source, and that the polluter should pay. Four principles, and EPSO tests them by swapping one for a plausible non-principle — sustainable development and proportionality are both real principles of EU law, and neither is in this list.
### Does Article 191 require the highest possible level of environmental protection?
No. It requires a high level of protection, taking into account the diversity of situations in the various regions of the Union. Upgrading the adjective to the highest is a distractor, and so is any option that drops the reference to regional diversity. The same high-level formula appears elsewhere in the Treaties, for example on consumer and health protection, which is why the exact wording is worth holding.
### What is the difference between the precautionary principle and preventive action?
Preventive action addresses a known risk: the harm is understood, so act before it happens. The precautionary principle addresses scientific uncertainty: where the possibility of serious harm exists but the evidence is not conclusive, the absence of full scientific certainty is not a reason to postpone protective measures. Questions that define one using the other's logic are testing this line.
### Which procedure applies to EU environmental legislation?
Article 192(1) makes the ordinary legislative procedure the rule, after consulting the Economic and Social Committee and the Committee of the Regions. Article 192(2) carves out a special legislative procedure with unanimity in the Council for provisions primarily of a fiscal nature, measures affecting town and country planning, quantitative management of water resources or land use, and measures significantly affecting a Member State's choice between different energy sources and the general structure of its energy supply.
## Official sources
- EUR-Lex — Consolidated version of the TFEU, Article 191 (OJ C 202, 7.6.2016): https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:12016E191
- EUR-Lex — Consolidated version of the TFEU, Article 192: https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:12016E192
- EU Careers — EPSO testing (official): https://eu-careers.europa.eu/en/selection-procedure/epso-tests

## This article in other languages
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Source of record: https://eu-now.com/blog/article-191-tfeu-environment-policy-explained — published by EU-now (eu-now.com), which is not EPSO and not affiliated with the European Commission.