Your electricity bill, the price of cement, your ferry ticket to the islands, even the interest rate on a business loan: all of them are now shaped by CO₂ emission regulations. This is no longer just a topic for environmentalists. It's about costs, competitiveness and opportunities in every sector of the economy.
Which industries are under the most pressure, which are finding new markets, and what should a business do to avoid falling behind? Let's go sector by sector.
CO₂ regulations at a glance
Before we get to the industries, it helps to know the main tools governments use:
- Emissions trading systems: such as the EU ETS, which caps emissions and puts a price on every tonne of CO₂.
- Carbon taxes: a fixed charge per tonne of emissions, used in a number of countries.
- Emission standards: limits for cars, trucks, ships and buildings.
- Disclosure requirements: companies and banks must publish data on their emissions and climate risks.
- Border mechanisms: the EU's CBAM charges for the CO₂ embedded in imported goods.
All of these share a common root in the commitments of the Paris Agreement.
1. Energy: from coal to sun and wind
Power generation was the first and biggest target of regulation. With a carbon price under the EU ETS, coal and lignite plants became uneconomic. Greece has lived this first-hand: its lignite phase-out accelerated, and renewables now supply roughly half of its electricity.
The new challenge is different. On sunny middays, solar power produces so much that renewable output often has to be curtailed. That's why the next big market is energy storage (batteries, pumped hydro), together with stronger grids and interconnections.
Opportunity: self-generation with rooftop solar and batteries for homes and businesses, green power purchase agreements (PPAs) and energy communities.
2. Industry: efficiency, hydrogen and CBAM
Steel, cement, aluminium, chemicals and fertilisers are the hardest sectors to decarbonise. In cement, for example, a large share of the CO₂ comes from the chemical reaction itself rather than from fuel.
Until recently these sectors received free emission allowances. From 2026, though, free allowances are being phased out and CBAM enters full application. Importers now pay for the CO₂ in goods brought in from outside the EU. Industry is responding with:
- energy audits and equipment upgrades for better energy efficiency,
- electrified processes and industrial heat pumps,
- green hydrogen for steel and chemicals,
- carbon capture and storage (CCS) where there's no other option,
- the circular economy: recycled materials and less waste.
3. Transport: electric cars, cleaner fuels, higher fares
Road transport
EU rules for cars require zero CO₂ emissions from new passenger cars from 2035, although the EU has opened a debate on more flexibility. For new heavy trucks, emissions must fall by 45% by 2030 and 90% by 2040. Carmakers are investing heavily in electric vehicles, batteries and charging networks. For the details, see the new EU policies for passenger vehicles.
Shipping and aviation
Since 2024, shipping has been part of the EU ETS, and since 2025 the FuelEU Maritime regulation has required progressively cleaner fuels. For a seafaring nation like Greece, that matters to shipowners and ferry passengers alike.
In aviation, flights within Europe are covered by the ETS, while international flights fall under CORSIA, run by the International Civil Aviation Organization (ICAO). CORSIA relies on offsetting and is voluntary until 2026, becoming mandatory for most countries from 2027. The EU also requires a rising blend of sustainable aviation fuels (SAF).
4. Agriculture: from problem to solution
Agriculture isn't part of the EU ETS, but it isn't outside the debate either. Methane from livestock, fertilisers and deforestation are major sources of greenhouse gases. Some countries are already acting: Denmark, for example, has agreed to tax livestock emissions from 2030.
Agriculture can also become part of the solution. The EU's new certification framework for carbon removals and carbon farming (CRCF) paves the way for paying farmers who store carbon in the soil. These practices include regenerative farming, reduced tillage, cover crops and agroforestry.
5. Buildings and construction: energy ratings matter
Buildings account for a large share of Europe's energy use. The revised Energy Performance of Buildings Directive (EPBD) requires new buildings to be zero-emission from 2030 and existing ones to be upgraded step by step. From the end of the decade, ETS2 will also put a carbon price on heating fuels.
What that means in practice:
- the energy efficiency rating on a property's energy certificate increasingly affects its value and rent,
- insulation, new windows, heat pumps and rooftop solar become investments, not luxuries,
- renovation grant schemes help finance home energy upgrades,
- new construction increasingly uses low-carbon materials and green building certifications such as LEED and BREEAM.
6. Finance: money follows carbon
Banks and investors now see emissions as a financial risk. The EU Taxonomy, the Sustainable Finance Disclosure Regulation (SFDR) and corporate sustainability reporting (CSRD, with its recent simplifications) demand transparency about where capital goes.
The result: rapid growth in green bonds and green loans for energy upgrades, and often better financing terms for companies with a credible emission-reduction plan. Those without a plan may find capital harder to come by.
What a business should do now
Whatever your sector, five steps make the difference:
- Measure your carbon footprint (Scope 1, 2 and 3). Large customers and banks will ask for it.
- Run an energy audit to find the cheapest savings.
- Invest in self-generation with solar, or lock in prices with a PPA.
- Check your CBAM exposure if you import steel, aluminium, cement, fertilisers or hydrogen.
- Benchmark against your sector with carbon benchmarking and report results transparently, without claims that look like greenwashing.
The takeaway
CO₂ regulations are no longer a distant threat. They are already changing prices, investment and business models across energy, industry, transport, agriculture, buildings and finance. Companies that treat them only as a cost will struggle. Those that use them as a guide to run more efficiently will find new markets and cheaper energy.
How is your industry affected? Share this article with colleagues who need to read it, and check our CO₂ Term Glossary for the technical terms.