We have all heard about the huge amounts of trash which we leave in our oceans. But the man-made islands of mostly plastic litter that we can see is only a fraction of the problem. What’s more dangerous is what we cannot see – tiny bits of plastic as small as a pin head or finer than a strand of hair.
Studies have found an abundance of these microscopic plastics in rivers and seas, and in the stomachs of everything from zooplankton to fish, seabirds and whales. They are even in places as remote as a Mongolian mountain lake and sea sediment 5km below sea level.