Marine litter and plastic pollution are growing environmental problems that require sustainable actions from a wide range of stakeholders. To achieve effective solutions, stakeholders need good knowledge and opportunities for active engagement. To encourage leadership and provide these opportunities, we have developed an action-, and change-oriented Massive Open Online Course (MOOC) on Marine Litter. After five years of running the MOOC, we assessed the impact of the MOOC through an online questionnaire among participants. The results showed significant impact and global reach. Respondents from all over the world reported that they used the information of the MOOC in their careers, volunteer work and personal lives. The results underscore the importance of environmental education to inform and inspire stakeholders. Educational activities should respond to participants' motivations by using activating learning forms and illustrative examples. The MOOC inspired participants to take informed action, engage others, expand their networks, and create real change.
Keywords: Action-oriented; Capacity development; Learning; Plastic pollution; Solutions; Sustainable development.
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