The world's best songs about battling pollution and climate change

Did you ever expect to hear Leonardo DiCaprio on a song? Well, thanks to Lil Dicky, that's now possible. The comedian-rapper released 'Earth,' a star-studded song about Earth and all its wonderful creatures. DiCaprio joins other celebrity cameos like Ariana Grande and Justin Bieber. Conversations about climate change are at an all-time high, yet artists have always written songs about taking care of our planet. From MJ to Marvin Gaye, many musicians have given their own two cents on the changing Earth. Click through this gallery to check out the world's best songs about pollution and climate change.