Yes, an electric car pollutes, but differently. It emits neither nitrogen oxides nor particles from the exhaust, its brakes produce far less dust than a combustion car's, and its tyres wear about like any other. What remains is battery manufacturing, which moves part of the problem to the mines.
Does an electric car pollute less than a combustion car?
Not at the exhaust. There the score is zero, and it is the only place where the comparison is clear-cut.
Over the vehicle's whole life, the ICCT puts the cut in greenhouse gases of an electric car versus a petrol car in Europe at about 73%, manufacturing included (press release of July 2025). That figure is about the climate, not about the air you breathe in town, and that is where the discussion gets muddled.
For air quality, an electric car keeps three sources of dust: the brakes, the tyres, and road wear along with the dust it stirs up. In its review of what is known about non-exhaust particles, Ademe (the French environment agency) finds no significant gap between the total emissions of a long-range electric car and those of a recent combustion car. It adds a point that is easily forgotten: a combustion car also emits nitrogen oxides and volatile organic compounds, which form secondary particles in the atmosphere. An electric car does not.
That report dates from spring 2022, and it should be said. Cars have changed since. I take it as an order of magnitude, not a verdict.
Regenerative braking removes up to 83% of brake dust
The figure comes from an analysis by EIT Urban Mobility and Transport for London, reported by Electrek on 27 May 2025: battery-electric cars cut brake dust by 83%, hybrids by 10 to 48% and plug-in hybrids by 66%. I have not re-read the study itself, only this summary.
The mechanism is simple. When you lift off the accelerator, the motor slows the car while recharging the battery, and the pads hardly touch anything. Our guide to regenerative braking details what this gives in range.
One reservation, all the same. In its report for the UK Department for Transport dated 9 December 2025, Ricardo confirms that regenerative braking largely offsets the weight of the battery for fine particles by mass (PM2.5). But the number of nanoparticles coming from brakes stays similar across combustion cars, plug-in hybrids and electric cars. Hard braking can multiply that number up to 100 times compared with gentle braking.
In other words, how you drive matters more than what is under the bonnet.
Do electric car tyres pollute more?
This is the most serious objection, and it is not groundless. In Ademe's table, tyre and road wear account for 61% of non-exhaust PM10 particles for an electric car, against 47% for a combustion car. Resuspended dust accounts for 36%, against 28%.
Be careful how you read it. These are shares, not volumes. When the brakes emit far less, everything else weighs mechanically more in the total without having increased. The chart is a pie in which one slice has shrunk.
Then there is the weight question. According to Electrek, which relays the London analysis, electric cars are on average 20% heavier than petrol cars, but that gap comes mostly from buying bigger cars. At equal size, a Tesla Model 3 weighs about 5% more than a BMW 3 Series. Even keeping the 20% figure, the analysis gives 38% lower brake, road and tyre emissions for the electric car. Brake dust is also more likely to stay airborne (over 40%) than tyre dust (1 to 5%).
The tyres themselves are not always wider: Ademe notes that the Peugeot e-208 runs on the same 195 or 205 mm as the petrol 208, while the Hyundai Kona Electric uses 215 against 235 mm on many combustion versions. The real culprit is elsewhere. A 208 wears 195 or 205 mm, a 2008 wears 215: moving to an SUV widens the rubber, whether the car is electric or not.
On regulation, car tyres come under Euro 7 for new types from 1 July 2028, according to the European Parliament. Electric car tyres have their own guide here.
Over 15,500 km a year, 46 g of brake dust against 108 g
Here is a calculation I have not seen anywhere for a Belgian driver. The political agreement on Euro 7 sets, according to the Council of the EU press release, a brake dust ceiling of 3 mg/km for a fully electric car and 7 mg/km for every other powertrain. At the exhaust, the Euro 6 standard limits particles to 4.5 mg/km for a diesel or a direct-injection petrol car. I multiply by the 15,500 km a Belgian drives on average each year (SPF Mobilité, 2024, a figure already used in our carbon footprint article).
| Particle source (legal ceiling) | mg/km | Over 1 year (15,500 km) | Over 10 years (155,000 km) |
|---|---|---|---|
| Brakes, combustion or hybrid (Euro 7) | 7 | 108.5 g | 1,085 g |
| Brakes, electric (Euro 7) | 3 | 46.5 g | 465 g |
| Exhaust, combustion (Euro 6) | 4.5 | 69.8 g | 698 g |
| Exhaust, electric | 0 | 0 g | 0 g |
These are ceilings, not measurements. A real car emits below them, and nobody drives on a type-approval cycle. Two lessons hold all the same.
First, for a combustion car, the legal ceiling for brake dust (7 mg/km) is higher than the one for the exhaust (4.5 mg/km). The tailpipe is no longer the only issue, even for it. Second, these brake ceilings do not yet bind a single buyer: Euro 7 applies to new car types from 29 November 2026 and to all new cars only from 29 November 2027. A car registered today escapes them.
Does the battery move pollution to the mines?
Partly, yes. I will not claim otherwise.
Manufacturing an electric car emits about 40% more greenhouse gases than a petrol car, according to the ICCT, a surplus made up after about 17,000 km in Europe. The Belgian figures, with the grid mix here, are in our carbon footprint article.
CO2 does not tell you where it happens. According to the USGS (Mineral Commodity Summaries 2026), world cobalt mine production reached about 310,000 tonnes in 2025, of which 230,000 came from Congo, about 73%, and 44,000 from Indonesia. The environmental and social weight of that extraction does not show in a carbon index: it falls on a few regions, not on the air of Brussels.
Two levers exist. LFP batteries, which use neither cobalt nor nickel, already power the BYD Dolphin, the Tesla Model 3 Standard and the MG4 sold in Belgium. And battery recycling in Hoboken, near Antwerp, brings cobalt back into the loop instead of digging it up again.
In Brussels, NO2 fell 46% at Arts-Loi between 2018 and 2024
The Arts-Loi station saw nitrogen dioxide concentrations drop 46% in six years, according to Brussels Environment (page published on 22 October 2025). The agency credits the low-emission zone.
An important nuance: the LEZ targets the oldest combustion cars, it does not credit electric ones. But the same page notes that the vehicles targeted by the 2025 stage, about 8% of the cars on the road, produce more than 40% of transport NOx. That is a projection, not a measurement. It still says where the bulk of the city's air problem lies: at the exhaust of old diesels.
An electric car emits no NOx at the exhaust. On fine particles, the same page ranks road traffic second among the capital's sources, with no percentage, and the electric car keeps its share of brake, tyre and stirred-up dust.
How can you pollute less with an electric car?
The motor does only half the job. The rest is down to your hands and to the dealer.
- Anticipate lights and slowdowns so regeneration brakes instead of the pads: hard braking raises the number of nanoparticles up to 100 times, according to Ricardo.
- Choose low-emission pads (ceramic or "low dust") at replacement. Ricardo finds the lowest PM2.5 emissions with these pads, and notes that a higher price is no guarantee of them.
- Avoid a body wider than necessary: Ademe notes that the move to SUVs widens tyres, and so the rubber left on the road.
- Do not oversize the battery: every extra kWh weighs on manufacturing, on weight and on wear.
One last, more down-to-earth habit: keep the car for a long time. Manufacturing is then spread over more kilometres.
Frequently asked questions
Does an electric car pollute more than a diesel?
No, over its whole life. The ICCT puts greenhouse gas emissions about 73% below a petrol car in Europe (July 2025), battery manufacturing included. On particles, the French agency Ademe finds no significant gap between a long-range electric car and a recent combustion car, and the diesel adds NOx at the exhaust.
Are the particles from an electric car dangerous?
Ademe admits that it is not yet known whether non-exhaust particles harm health as much as exhaust particles. Toxicology studies point to metals such as copper, barium, zinc and iron, found mainly in brake pads. An electric car uses them less.
Where does the cobalt in batteries come from?
Mostly from Congo. The USGS counts 230,000 tonnes out of about 310,000 tonnes mined worldwide in 2025, or about 73%. Indonesia follows with 44,000 tonnes. LFP batteries contain none at all.
Are there legal limits for brake and tyre dust?
The Euro 7 regulation sets them. It applies to new car types from 29 November 2026 and to all new cars from 29 November 2027. For car tyres, new types are covered from 1 July 2028.
Does a heavy electric car wear its tyres faster?
It wears them faster than a light city car, that is true. But the fair comparison is at equal size: a Tesla Model 3 weighs about 5% more than a BMW 3 Series, not 20%. Choosing an SUV matters more than choosing an electric car.
Le verdict de Christophe F.
An electric car does not clean up the road, it relieves it of one source: the exhaust pipe. Its brakes are cleaner, its tyres at the same level as a combustion car of the same size, its battery heavier to build. If your priority is the air in town, it removes the exhaust and does not worsen the rest. If it is the footprint of the mines, choose a reasonably sized LFP battery and keep the car for a long time.
