Which annual gathering that takes place at Black Rock City did Further Future want to change the  "vanish and leave no trace" principles instilled in those who participate in it
Burning Man Burning Man is an annual gathering that takes place at Black Rock City—a temporary city erected in the Black Rock Desert in Nevada. The event is described as an experiment in community and art, influenced by 10 main principles: "radical" inclusion, self-reliance, and self-expression, as well as community cooperation, civic responsibility, gifting, decommodification, participation, immediacy, and leaving no trace.
Rainbow Family The Rainbow Family of Living Light (commonly shortened to the Rainbow Family) is a counter-culture, hippie group, in existence since approximately 1970. It is a loose affiliation of smaller groups and individuals, some nomadic, generally asserting that it has no leader. They put on yearly, primitive camping events on public land known as Rainbow Gatherings.