From the Antarctic to the deepest depths of the ocean, microplastics are found in increasingly large numbers. These tiny, seemingly inescapable plastics pose a range of threats to human health, animal life and the ecosystems on which we rely. How can we deal with this avalanche of microplastics? For more, Dr Maria Armoudian speaks to Professor Nathalie Gontard, research director at France's National Research Institute for Agriculture, Food and Environment, formerly a professor at the Universities of Montpellier and Kyoto; and Dr Samantha Ladewig, a research fellow at the University of Auckland who studies the effect of microplastic pollution on marine environments.