Marine litter is a global problem that affects every ocean of the world. Litter is an environmental, human health and socio-economic problem that is a symptom of a highly disposable society. With worldwide growth in the amount of solid litter thrown away every day and slow rates of degradation, the amount of litter present in the marine environment is increasing. This Massive Open Online Course (MOOC) seeks to inspire students to take action and leadership in the arena of marine litter through stimulating interaction with all stakeholder groups. The MOOC has been built on the highly successful first marine litter MOOC that was organized in 2015 and consisted of two week leadership track and eight week expert track. The Marine Litter MOOC 2.0 will start on May 22, 2017 and you can enroll here: https://www.marinelittermooc.org/learn/marine-litter-mooc-may-2017