(CNN) -- They're in our oceans, soil, air, snow -- and even in your cup of tea. Plastic tea bags are shedding billions of shards of microplastics into their water, according to a new study.

A couple of years ago, Nathalie Tufenkji stopped by a Montreal cafe on her way to work and ordered a cup of tea. She sat down with her mug, enjoying its warmth, before she noticed something strange: ...

(CNN) -- They're in our oceans, soil, air, snow-- and even in your cup of tea. Plastic tea bags are shedding billions of shards of microplastics into their water, according to a new study. Researchers ...