CSIRO scientists have discovered plastics in the sediment of the Great Australian Bight, an isolated and biodiverse seabed area.
The scientists found the microplastics in samples taken from 2 kilometres below the surface, leading conservationists and scientists to call for reduced plastic use.
Dr Denise Hardesty, a research scientist at CSIRO, said this shows how ubiquitous plastics and human-made waste are in our environment.