World Environment Day occurs annually on June 5th and is coordinated by the United Nations to promote worldwide awareness and action to protect the environment. It has brought attention to issues like marine pollution, overpopulation, climate change, and sustainability. Each year it focuses on a new theme adopted by governments, organizations, and celebrities to advocate for environmental causes. The theme in 2017 was "Connecting People to Nature" and highlighted the importance of natural systems for humanity. World Environment Day encourages ongoing advocacy and action to promote environmental responsibility and conservation of natural resources.