World Environment Day is celebrated annually on June 5th to protect, restore, and conserve ecosystems for a sustainable future. The 2023 theme focuses on restoring ecosystems and sustaining the planet. Ecosystems include forests, wetlands, oceans, and grasslands. Key threats to the environment are pollution, deforestation, climate change, overpopulation, and improper waste management. Tips to save the environment include planting trees, using renewable energy, composting food waste, and limiting chemical usage. Together, individual actions can contribute to a healthier environment.