RT null T1 Microplastics A1 United Nations Environment Programme, K1 microplastic YR 2014 FD 2014 LK https://wedocs.unep.org/handle/20.500.11822/12079 UL https://wedocs.unep.org/handle/20.500.11822/12079 NO Microplastics are tiny plastic particles up to 5mm in diameter. In the last four decades, concentrations of these particles appear to have increased significantly in the surface waters of the ocean. Concern about the potential impact of microplastics in the marine environment has gathered momentum during the past few years. The number of scientific investigations has increased, along with public interest and pressure on decision- makers to respond. DS UN Environment Document Repository RD Sep 22, 2026