What problem did Jacques Cousteau identify as an Earth-care problem?

Jacques Cousteau identified marine pollution, particularly the impact of human activities on ocean ecosystems, as a significant Earth-care problem. He highlighted issues such as oil spills, plastic waste, and overfishing, which threaten marine life and biodiversity. Cousteau advocated for ocean conservation and sustainable practices to protect marine environments, emphasizing the interconnectedness of ocean health and global ecological well-being. His work aimed to raise awareness and inspire action to address these critical environmental challenges.