2017 study by IUCN on tire dust pollution

[malcolm]

Invisible plastic particles from textiles and tyres a major source of ocean pollution – IUCN study

Full report: Primary microplastics in the oceans | IUCN Library System

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Discussion podcast from 2019 Fully Charged Live (changes to video @ 1:40):

 

[malcolm]

Jun 2019 - concerns regarding US playground surfaces
US playgrounds: fears grow over health risks from rubber particles

News item from 2017. Possible health issues with the use of tire crumb in synthetic turf:
Soccer players' cancers ignite debate over turf safety - CNN

2017 blog from OU: Artificial turf and cancer risk | OUPblog