Public concern about, and desire for research into, the human health effects of marine plastic pollution: Results from a 15-country survey across Europe and Australia

•15-country survey of health-related perceptions of marine plastic pollution.•Public extremely concerned over human health impacts of marine plastic pollution.•Strong public support for research into marine plastic pollution and human health.•Socio-political and personality factors predict public concern and research support.•Public concern is positively associated with support for research.