Car tyres have been confirmed again as a major source of microplastics in the oceans, although fashion still provides more microplastics when items are washed.
There are many hundreds of millions of miles driven by motorists each year and each mile you drive, the tyres wear down. That lost material doesn't just disappear, it goes onto the road surface, and then gets washed off by rain into drains, or otherwise onto the ground, from which it ends up in nearby rivers. From there it goes to the sea at some point, and adds to the trillions of tiny pieces of plastic in the world's oceans.
Prior to the lockdown I started work on a resource with a local company which has been making huge steps towards carbon neutrality. The resource is partially finished, but will be shared here when ready.