robindesbois.org
https://robindesbois.org/plan-coordonne-de-reduction-des-macrodechets-2009/
https://robindesbois.org/category/balisage/dechets/dechets-dans-leau

IMARES (Institute for Marine Resources and Ecosystem Studies - Wageningen UR)

https://www.wur.nl/en/Research-Results/Research-Institutes/marine-research/show-marine/Plastic-waste-in-the-Sea.htm