Indonesian scientists have launched the largest ever study into whether tiny plastic particles can affect human health.
They are investigating the presence of plastic in seafood while also tracking the diets of 2,000 people.
There is no evidence yet that ingesting small pieces of plastic is harmful but potential impacts cannot be ruled out.
Plastic pollution has become so severe in Indonesia that the army has been called in to help.
While public attention is focused on larger items like bags and bottles choking rivers and canals, there is emerging scientific concern over the long-term implications of smaller and less visible pieces known as microplastics.