Stikstof — why the Netherlands is stuck on nitrogen and the UK isn't

01 / 11

Nitrogen itself isn't the problem

The air around you is 78% nitrogen. That's nitrogen gas, N₂: two nitrogen atoms bound together so tightly that almost nothing can break them apart. You breathe it in and out all day. Completely harmless.

The problem is the reactive forms. When nitrogen combines with hydrogen or oxygen, you get compounds that really do something in nature. Two of them matter — and they behave in completely different ways.

Form 01 — harmless

N₂ nitrogen gas

Found in ordinary air. Does nothing, reacts with nothing, settles nowhere. This is not what the crisis is about.

Form 02 — the lead character

NH₃ ammonia

Released when dung and urine meet — in the barn, in the slurry pit, on the fields. Sharp smell. Sticks to everything. Comes back down close to the source.

Form 03 — the traveller

NO_x nitrogen oxides

Produced by combustion: cars, ships, factories, gas boilers. Stays in the air for a long time and drifts hundreds of kilometres.

That difference in travel distance is the key to the whole story.

02 / 11

Ammonia lands in your own back garden

Exhaust fumes blow away. Emissions from a barn mostly stay at home. A large share of the ammonia from a Dutch barn comes back to earth within a few kilometres — often still in the same province.

For a small, crowded country with a lot of animals, that's disastrous. You mainly pollute your own nature reserves. A large country with the same barns would spread the emissions over far more ground.

Schematic. Ammonia from barns and manure mostly comes back down within a few kilometres; nitrogen oxides from combustion stay airborne much longer. Roughly a third of the nitrogen deposited in the Netherlands comes from abroad — and Dutch emissions blow out of the country too. The height of the curves shows the amount of deposition, not an exact measurement.

03 / 11

The route: from cow to heathland

The mechanism is simple, and that's exactly what makes it hard to deny. There are only five steps between a barn and a disappearing plant.

Why is more nitrogen bad for nature? Because nitrogen literally is fertiliser. Heathland, peat bogs and old sandy soils are poor soils: the plants and insects that live there are specialists in scarcity. Add nutrients year after year and fast growers like grass, nettles and brambles win — and the rare species disappear. The soil also acidifies, so trees root less well and birds such as the great tit lay eggs with shells that are too thin.

04 / 11

Just how full is the Netherlands?

This is the first of five reasons why the Netherlands is stuck and the United Kingdom isn't. The Netherlands has the highest livestock density in the entire European Union. Not slightly the highest — by a wide margin.

0 LSU per hectare · NL Livestock units per hectare of farmland. The EU average is around 0.7.

0 LSU per hectare · UK About a quarter of the Dutch density, and well below the EU average.

0 kg NH₃ per km² · NL Ammonia emissions per square kilometre — the highest in Europe after Malta.

0 kg NH₃ per km² · UK Roughly a fifth of that, over a much larger land area.

Each dot is the same amount of animal. The Netherlands has about 100 million chickens, 11 million pigs and almost 4 million cattle — in a country home to 18 million people. British livestock farming is mostly grass-based: sheep on the hills, dairy cattle in the West Country and Wales, spread over a country almost six times the size.

How did it get this way?

After the Hunger Winter of 1944–45, "never again hunger" became government policy, quite literally. Dutch agriculture minister Sicco Mansholt — later the architect of Europe's Common Agricultural Policy — bet on scale, technology and exports.

That plan succeeded spectacularly. With around €125 billion in agricultural exports, the Netherlands is the second-largest agricultural exporter in the world, after the United States. From an area roughly twice the size of Wales.

The hidden trick: imported feed

Dutch animals eat a large share of imported soya and grain, shipped in through Rotterdam. The feed comes from Brazilian and American fields — but the manure stays here.

The result is a country that feeds far more animals than its own land can carry. The bill sits in the slurry pit.

05 / 11

Reason two: nature sits next to the barn

Even with lots of livestock the problem would be manageable if the nature reserves were far away. But the Netherlands has no "far away".

Dutch nature consists of 162 relatively small, fragmented Natura 2000 sites, squeezed between villages, motorways and farmland. In the United Kingdom the most sensitive protected areas lie mainly in the Scottish Highlands, the Welsh mountains and along the coast — miles away from intensive livestock farming.

On the right is a diagram, not a map. It shows the principle: in the Netherlands nature and livestock farming are mixed like a chessboard, so almost every site receives ammonia from its neighbours. In the UK the most sensitive habitats (blanket bog, Scottish upland heath) are concentrated in sparsely populated regions. In total the UK actually has far more protected land — but distance from the source does the work.

The Netherlands doesn't pollute more per cow. It just has almost no room between the cow and the nature.

06 / 11

Reason three: the KDW — a number with legal teeth

Every habitat type has a critical deposition value (in Dutch: kritische depositiewaarde, KDW): the amount of nitrogen that can fall on it each year without the habitat deteriorating. It's expressed in mol N per hectare per year.

Unlike most countries, the Netherlands wrote that number into law as a hard test. And it turns out that in about 118 of the 161 sites deposition is structurally above the limit. For some habitat types, as much as three times higher.

Read the bars as the permitted limit. Where the red dashed line extends well beyond a bar, that habitat type is structurally getting too much nitrogen. The excess is largest for moorland pools and raised bog. The UK average is lower, but certainly not zero — the difference lies mainly in what's legally attached to it.

07 / 11

Reason four: 29 May 2019, the day the lock snapped shut

This is where an environmental problem becomes a crisis. The Netherlands had come up with a clever scheme: the PAS (Programma Aanpak Stikstof, the Nitrogen Action Programme). The reasoning: we promise to cut nitrogen in the future, so we may already issue permits now for new barns, roads and housing estates.

On 29 May 2019 the Council of State — the country's highest administrative court — threw that out. Granting consent on the basis of promised future gains isn't allowed under the European Habitats Directive. You have to know for certain, beforehand, that nature won't be harmed.

Overnight there was no longer a valid system for issuing permits. An estimated 18,000 projects ground to a halt: housing, road widening, wind farms, business expansions. Not because new emissions were being added, but because nobody could prove any more that they were allowed.

1945 – 1970"Never again hunger." Post-war reconstruction, land consolidation and Sicco Mansholt's policies turn the Netherlands into a farming machine.
1992The EU adopts the Habitats Directive. Member states designate protected areas: the Natura 2000 network.
1984 – 2015Milk quotas cap the growth of the dairy herd. When they end in 2015, the herd immediately grows again.
2015The PAS comes into force: permits based on promised future reductions.
November 2018The Court of Justice of the European Union rules, in the so-called Dutch nitrogen case, that consent may only be given once harm has been scientifically ruled out.
29 May 2019The Council of State declares the PAS invalid. Around 18,000 projects stall. This is the starting gun of the nitrogen crisis.
Oct 2019 & July 2022Huge farmer protests. Tractors on the motorway, upside-down flags on lamp posts, blockades of distribution centres.
2021The Nitrogen Reduction and Nature Improvement Act sets legal targets for 2025, 2030 and 2035.
June 2022The notorious nitrogen map: reduction percentages per area of up to 70% or even 95%. The anger escalates.
March 2023The Farmer–Citizen Movement (BBB) wins the provincial elections and becomes the largest party in the Senate.
January 2025Greenpeace wins against the State. The court orders the government to bring half of all nitrogen-sensitive nature below the critical value by the end of 2030, on pain of a penalty payment.
2025 – 2026The State appeals; the government wants to push the halving back to 2035. Permitting remains difficult, and the debate goes on.

08 / 11

Reason five: the electoral system turns it into an earthquake

This is the reason most often forgotten — and perhaps the most important one for the political difference.

The Netherlands elects its parliament by fully proportional representation: 150 seats, and with around 0.67% of the vote you're already in the House of Representatives. A new party that owns a single issue can become one of the most powerful parties within a single election. That's what BBB did in 2023.

The UK votes by constituency, first past the post. A farmers' party with 10% of the vote, spread across the country, wins exactly zero seats. Rural discontent there gets absorbed into the existing big parties — visible as grumbling, not as a shift in power.

Same anger, different socket. British farmers protested hard in 2024 and 2025 — including driving tractors to Westminster over inheritance tax on farmland. But that protest can't turn into a parliamentary party of its own. In the Netherlands it can, and that's why nitrogen sets the national political agenda there.

09 / 11

But wait: the UK does have its own version

It would be too easy to say England doesn't know this problem. It knows it in a different form, and with far less noise.

England

"Nutrient neutrality"

Since 2018–2019, English councils in dozens of river catchments have been barred from approving homes that would add extra nitrogen or phosphorus to vulnerable waters. That covers the Solent, the River Wye, the Norfolk Broads and more.

An estimated 100,000 or so homes have been delayed as a result. Exactly the same legal mechanism — and it's even based on the same European ruling as the Dutch case.

Four differences that change everything

1. Water instead of air. The English problem is about run-off into rivers, not deposition from the air. Water follows a catchment; ammonia follows the wind and so hits far more sites at once.

2. Regional, not national. It affects particular catchments, not the whole country. In the Netherlands, permitting stopped everywhere.

3. Builders, not farmers. The bill landed mainly with developers. In the Netherlands it immediately became about whether family farms had a right to exist — an existential question, not a business one.

4. Ministers can change the rules. After Brexit, Westminster can amend nature law itself; and it did, with legislation that relaxes the test. The Netherlands is bound by European directives and by a national court that enforces them strictly.

The UK has the same law, fewer animals per hectare, more distance to nature — and a parliament that's allowed to adjust the rules itself.

10 / 11

The big comparison

Everything side by side. Figures are rounded and refer to the most recent years available; they're meant to show orders of magnitude, not to be accurate to the decimal point.

Table 1 — Land, farming and emissions
Feature	Netherlands	United Kingdom
Area	± 41,500 km²	± 243,600 km²
People per km²	± 525	± 285
Livestock density	3.4 LSU/ha — highest in the EU	± 0.8 LSU/ha
Type of livestock farming	Intensive; housed pigs, poultry and dairy cattle on little land	Mostly grass-based; sheep on the hills, dispersed dairy
Animal feed	Largely imported (soya, grain) — the manure stays behind	Mostly home-grown grass and crops
Ammonia per km²	± 4,930 kg	± 1,100 kg
Average deposition	± 1,315 mol N/ha/yr	± 800 mol N/ha/yr
Agricultural exports	± €125 bn — 2nd in the world	Net importer of food

Table 2 — Nature, law and politics
Feature	Netherlands	United Kingdom
Protected areas	162 Natura 2000 sites, small and fragmented	Hundreds of SACs and SPAs, often large and remote
Location relative to livestock	Directly next to and among farmland	Most sensitive habitats mainly in Scotland, Wales and on the coast
Legal framework	EU Habitats Directive, directly binding	Habitats Directive transposed into domestic law; amendable since Brexit
Hard limit	KDW enshrined in law as a test for permits	Critical loads exist as guidance, no national permitting lock
Tipping point	29 May 2019 — PAS invalid	2018–2019 — nutrient neutrality per catchment
What stalled	± 18,000 projects, nationwide	± 100,000 homes, regional
Electoral system	Proportional; threshold ± 0.67%	Constituencies; first past the post
Political consequence	BBB from nothing to largest party in the Senate (2023)	Discontent stays within the existing parties
Public temperature	Years of protests, upside-down flags, governments under pressure	Occasional protests (e.g. inheritance tax 2024–25), no national crisis

11 / 11

The five locks, together

None of these five factors would cause a crisis on its own. The Netherlands has all five at once. That is the whole answer.

Extremely high livestock per hectareMore than four times the British density, fed on imported feed whose manure stays behind.
Ammonia doesn't travel farUnlike exhaust fumes, manure emissions come down close by. You mainly pollute your own nature.
Nature and farms are neighbours162 small, fragmented sites in a small country. There's no distance to hide behind.
A hard limit written into lawThe KDW isn't a guideline but a test. If you're above it, the permit is legally impossible.
A court that turned the key29 May 2019: the PAS invalid, and with it the entire permitting system. That's where the crisis began.

And then a sixth: an electoral system in which the angry half of the countryside can shift power within a single election.

Where do things stand now?

As of 2026, the matter isn't resolved. In January 2025 the court ordered the State to bring half of all nitrogen-sensitive nature below the critical value by the end of 2030, with a penalty payment as the stick. The State appealed, and the government wants to push the targets back to 2035.

Meanwhile housing projects wait, farmers remain uncertain about the future of their businesses, and nature quality in many areas is still declining. It has become less an environmental problem and more a question of distribution: who gets the remaining room — the barn, the factory, the motorway or the housing estate?

If you want to remember one sentence about the difference with England: the Netherlands has the same law, but far less room in which to let that law breathe.