Silver in clothing can harm the environment
However, the silver washes out very quickly and ends up in the environment, where it can do damage.
So, when buying your next sports clothes, make sure they don't contain silver.
You can see the video here and the report is here. And if you recognise the star, it's the chairman of the EurEau Joint Working Group on the Water Framework Directive, and Svenskt Vatten team member, Anders Finnson.