How the EU ETS Works

This graphic illustrates how carbon trading actually works under the EU Emissions Trading System. Company A’s emissions are below its free allocation of carbon allowances, creating a surplus. Company B’s emissions are above its free allocation, meaning it doesn’t have enough allowances to comply with the system and is facing fines for potential non-compliance. Company B has three options to meet its obligations: buy surplus allowances from Company A; buy allowances from government auctions; or reduce its emissions to avoid having to buy any allowances.

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LATEST VISUAL LEARNING

This chart shows the total amount of man-made emissions created by the world's biggest polluters.
The amount of atmospheric CO2 has charted a steady climb higher. The Mauna Loa Observatory on the north flank of volcano of the same name
The European Union’s Carbon Border Adjustment Mechanism (CBAM) began its so-called ‘definitive regime’ phase on 1st January this year, meaning the tariff mechanism has moved
Under CCS, carbon emissions are captured and permanently stored, for example in geological storage sites.
Carbon Capture, Utilisation and Storage (CCUS) is a method of reducing carbon dioxide emissions by trapping the gas for industrial use or permanent storage, preventing

26 January 2026

HIGHLIGHT
EU CBAM ‘real cost’ phase begins

The European Union’s Carbon Border Adjustment Mechanism (CBAM) began its so-called ‘definitive regime’ phase on 1st January this year, meaning the tariff mechanism has moved from a reporting obligation to a real-world cost for companies...

15 January 2025

GLOSSARY
CCUS/CCS

Under CCS, carbon emissions are captured and permanently stored, for example in geological storage sites.

23 December 2025

ARTICLE
What is Carbon Capture, Utilisation & Storage?

Carbon Capture, Utilisation and Storage (CCUS) is a method of reducing carbon dioxide emissions by trapping the gas for industrial use or permanent storage, preventing its release into the atmosphere.

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