The first-known direct observations of the movement of microfiber plastics through a thin layer of soil-like particles show that they tend to tumble, roll and sometimes get stuck in spaces.
Countries are meeting to agree the first ever global treaty on curbing plastic pollution. Research suggests where bans and incentives can make a difference.
With tons of plastic leaking into our seas annually, these hard-hitting images show the devastating consequences plastics are having on marine ecosystems around the world.