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Photo provided by the Commonwealth Scientific and Industrial Research Organisation (CSIRO) on Oct. 7, 2020 shows researchers collecting and analyzing samples from the seafloor to estimate the amount of microplastics. Australia's national science agency has found that there are about 14 million tonnes of small plastic pieces on the ocean floor. The CSIRO on Tuesday published a world-first global estimate for the extent of microplastic pollution in the deep ocean. (CSIRO/Handout via Xinhua)