The additional PMs is only for additional weight as I understand it and taken as a whole I cannot see that a little EV like mine is producing similar PMs to an average ICE car, particularly diesel emissions, and brakes is another area as we tend not to use brakes to slow down in an EV but we use regeneration. I have read a few articles on this and here is, I think, I well written and balanced appraisal of it.... (Feel free to add your recent scientific source on the issue)....
https://epha.org/electric-vehicles-and-air-pollution-the-claims-and-the-facts/
It sounds like we need some better tyre constructs. A recent Zoe test had the car go 424 miles in standard tyres and 475 on special tyres, quite a difference.
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Electric vehicles and air pollution: the claims and the facts
1.EVs reduce pollution from brake and tyres
On brake pollution, conventional internal combustion engine (ICE) cars mainly use disc brakes to slow the car down, which emits particle pollution. In contrast, EVs use “regenerative braking” as it restores braking energy back to the car’s battery to power the car. This process reduces the need to use the brakes and therefore reduces particle emissions.
On tyre pollution, EVs have heavier weight compared to ICE cars and, according to some reports, this extra weight increases wear and thus particle pollution. Yet, EVs are mostly fitted with special tyres designed to cope with the heavier weight of batteries to ensure that they do not wear out too quickly. More studies are needed to measure particle emissions from tyres, especially from EVs, but all road vehicles, including heavy SUVs, are to blame for tyre pollution.
2. EVs reduce particle pollution
Focusing on ‘primary’ particle mass (PM) emissions, i.e those particles which are emitted directly from the exhaust, tyres and brakes, should not lose sight of ‘secondary’ particle pollution. These particles form in the air due to other pollutants such as nitrogen oxides (NOx), hydrocarbons (HC) and ammonia (NH3) emitted from the tailpipe. Like primary particles these ‘secondary’ particles also contribute to PM2.5 (particles smaller than 2.5 microns) and PM10 (particles smaller than 10 microns) pollution, thereby causing poor air quality.
According to a recent study by the Organisation for Economic Co-operation and Development (OECD), these secondary particles can contribute up to 29% of the total PM emissions of a car. Most importantly, the OECD study found that when all particle sources associated with cars are counted, including secondary particles, EV cars contribute less PM2.5 and PM10 than diesel or petrol cars...................................
In conclusion, EVs do not produce more pollution than fossil fuelled cars. On the contrary, they eliminate emissions from engine exhaust and significantly reduce emissions from brakes. The evidence on tyres is more mixed. However, claims that EVs create more particle pollution due to tyres are misleading as they ignore their overall air quality benefits. Particle emissions should not be used as an excuse to slow down the transition to zero emission mobility. Instead, regulations should address pollution from brakes and tyres to ensure that emissions from these sources are reduced for all road vehicles.