I have worked in sustainability efforts for music festivals. Here are some links about waste in the music industry.
The Paramount+ documentary LOLLA: The Story of Lollapalooza discusses the topic. HBO has CNN The Whole Story with Anderson Cooper which discusses environmental and political issues. The episode “Change Amplified: Live Music and the Climate Crisis” discusses the topic of waste in the music industry.
Seaside Sustainability: The Environmental Impacts of Music Festivals
Sustainability Magazine: Can Festivals Go Green?
Clean Waste: Exploring the Environmental Impact of Festivals
TSE Entertainment: Environmental Impact of Music Festivals
Forbes: How Music Festivals and Live Events are Embracing Sustainability