Microplastics can be ingested directly. Fish could ingest microplastics when they're eating something else. We could ingest microplastics by ingesting a fish that has microplastics in its tissue. We could also ingest microplastics directly from the air we breathe or the water we drink. These microplastics are everywhere, and as I said, there are definitely studies showing that they are having a negative impact on wildlife, including behavioural changes and changes in reproduction. We're just starting to hit the tip of the iceberg when it comes to the potential impacts on human health.
On April 28th, 2021. See this statement in context.