For the third year, the Dutch non-profit organisation Healthy Seas returned to the Greek island of Ithaca to reclaim waters polluted and rendered dangerous by abandoned fish farms.
The island has two "ghost farms" that have sat abandoned for more than a decade. They release debris, plastics, and pollutants into the marine environment, disrupting ecosystems and endangering flora and fauna.
Watch the full report in the player above to find out more.
