Burning Man Girls, Black Rock Desert, Nevada, United States

Even water is not to be dumped on the playa, and used shower water must be captured and either evaporated off, or collected and carried home with each participant. Methods used for evaporating water normally include a plastic sheet with a wood frame. The playa dust often blows into these catch basins and some participants end up with a muddy mess to take home. Careful design of small scale evaporating ponds has become an engineering competition, to see what works best.
The Bureau of Land Management, which maintains the desert, has very strict requirements for the event. These stipulations include trash cleanup, removal of burn scars, dust abatement, and capture of fluid drippings from participant vehicles. For four weeks after the event has ended, the Black Rock City Department of Public Works (BRC – DPW) Playa Restoration Crew remains in the desert, cleaning up after the temporary city in an effort to make sure that no evidence of the event remains.
Burning Man and its effect on global warming
Burning Man's Carbon Dioxide footprint is primarily from transportation to the remote area. The CoolingMan organization has estimated that the 2006 Burning Man was responsible for the generation of 27,000 tons of carbon dioxide, with 87% being from transportation to and from the remote location. The Sierra Club has criticized Burning Man for the "hundreds of thousands" of plastic water bottles that end up in landfills, as well as ostentatious displays of flames and explosions.