Emissions Analytics provides various samples from its tests to give an all-round view of tyre pollution. The team has now tested more than 300 tyres on the European market, identifying 78 organic compounds and recognising 46 hazards codes. It turns out the least toxic tyre compound is 85% less polluting than the most toxic version.
I think the answer does lie in using less toxic tyres, as a starting point, something I was suspecting.
Another source says:
The International Union for Conservation of Nature pegs tires as the second leading source of microplastic pollution in oceans, and one 2017 study found a global per capita average of .81 kilograms in tire emissions per year, ranging from .23 kg per year in India to 4.7 kg (roughly 10 pounds) in the US. That may seem minor stacked up against the nearly 300 pounds in plastic waste the average American generates each year, but microplastics are tiny by definition — and an insidious source of toxins that researchers are only beginning to understand.
There is a colossal difference between India (where I live) and US, for example.
Also another article points out only large BEVs will be heavy, as usual BEVs will become similar in weight to normal fossil fuel cars by 2025.
Motorcycles produce exponentially lower pollution than cars, and cycles more or less produce none, which should be used, but cars are a need due to shitty designing of cities, and capitalist growth chasing.