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Europe's air keeps getting cleaner as key emissions fall

Europe's air keeps getting cleaner as key emissions fall

Rule Changes

CAMS 2025 assessment finds regulated pollutants still declining, even as wildfires and winter smog spike local readings

June 29th, 2026: CAMS releases European Air Quality Assessment 2025

Overview

Europe's air is cleaner than it was a decade ago, and it is still improving. A new assessment from the Copernicus Atmosphere Monitoring Service (CAMS) finds that emissions of the most-regulated pollutants keep falling across the continent.

Industrial sulphur oxide emissions have dropped 59% since 2015. Road-transport nitrogen oxides are down 40%. Cleaner air means fewer heart and lung deaths, so the direction of travel matters for millions of people who never read an emissions report.

Why it matters

Dirty air shortens hundreds of thousands of European lives each year; the CAMS report shows the main pollutants are still on their way down.

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Key Indicators

59%
Industrial sulphur oxides
Drop in industrial sulphur oxide emissions across the EU since 2015.
40%
Road-transport nitrogen oxides
Fall in nitrogen oxide emissions from road transport since 2015.
34%
Road-transport fine particles
Decline in fine particulate matter (PM2.5) from road transport since 2015.
3-5%
Yearly decline in SOx and NOx
Average annual drop in sulphur and nitrogen oxide emissions over the past decade.
35+
Days over PM2.5 limit
Daily limit exceedances in Italy's Po Valley and parts of Eastern Europe in 2025.

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Timeline

January 2015 June 2026

7 events Latest: June 29th, 2026 · 1 week ago
Tap a bar to jump to that date
  1. CAMS releases European Air Quality Assessment 2025

    Latest Report

    The report confirms regulated pollutants keep falling while winter smog, heat, dust, and wildfires still cause sharp local spikes.

  2. Summer heat drives an ozone spike

    Pollution episode

    A major ozone episode forms during August heat, one of four flagged events of the year.

  3. Iberian wildfires break records

    Pollution episode

    Wildfires burning through August 19 become the Iberian Peninsula's worst of the 21st century. Smoke reaches France.

  4. Saharan dust reaches Europe

    Pollution episode

    A dust intrusion from the Sahara raises particle levels across parts of the continent.

  5. Winter smog crosses borders

    Pollution episode

    A transboundary fine-particle (PM2.5) episode pushes readings up under cold, stable winter conditions.

  6. Baseline year for the decade of cuts

    Baseline

    CAMS measures a decade of emissions cuts against 2015 levels for industry and transport.

Historical Context

3 moments from history that rhyme with this story — and how they unfolded.

December 1952

Great Smog of London (1952)

A five-day smog from coal smoke settled over London under still, cold air. Visibility fell to a few metres. Contemporary estimates linked thousands of deaths to the event.

Then

Public alarm forced air pollution onto the national agenda for the first time.

Now

Britain passed the Clean Air Act in 1956, restricting coal burning and creating smoke-control zones.

Why this matters now

It shows the same mechanism CAMS tracks today: winter weather trapping pollution near the ground turns steady emissions into a deadly spike.

1990

US Acid Rain Program (1990)

Amendments to the US Clean Air Act capped sulphur dioxide from power plants and let companies trade emission allowances. Utilities cut sulphur far faster and cheaper than critics predicted.

Then

Power-plant sulphur dioxide fell sharply through the 1990s.

Now

The program became the model for using emission limits to curb industrial sulphur, the same pollutant now down 59% in EU industry.

Why this matters now

It explains why Europe's industrial sulphur has dropped so fast: firm caps on the biggest sources deliver most of the gains.

December 1999

Gothenburg Protocol (1999)

European and North American governments signed a treaty setting national ceilings for sulphur, nitrogen oxides, ammonia, and volatile organic compounds. It tied clean-air targets to specific tonnage limits per country.

Then

Countries began aligning national emission caps with agreed ceilings.

Now

The protocol, revised in 2012, underpins the EU emission targets that the CAMS reports now measure against.

Why this matters now

The decade of decline CAMS documents is the payoff from binding national ceilings set years earlier.

Sources

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