During Earth Day festivals, prominent environmental themes focus on sustainability, conservation, and awareness of ecological issues. Events often include educational workshops and presentations that emphasize the importance of protecting the environment. Participants engage in community clean-ups, tree plantings, and demonstrations of eco-friendly practices. Art installations made from recycled materials may be showcased to highlight creative ways to reduce waste. Additionally, local organizations often take part in promoting renewable energy solutions, fostering a sense of accountability for the planet's health. Overall, these festivals serve as a platform for advocating for a more sustainable future.