Cleanup needed on the Sea of Tranquility

[H]ere is a rough (and only partial) inventory of the stuff mankind has left on the moon:

• more than 70 spacecraft, including rovers, modules, and crashed orbiters
• 5 American flags
• 2 golf balls
• 12 pairs of boots
• TV cameras
• film magazines
• 96 bags of urine, feces, and vomit
• numerous Hasselbad cameras and accessories
• several improvised javelins
• various hammers, tongs, rakes, and shovels
• backpacks
• insulating blankets
• utility towels
• used wet wipes
• personal hygiene kits
• empty packages of space food
• a photograph of Apollo 16 astronaut Charles Duke's family
• a feather from Baggin, the Air Force Academy's mascot falcon, used to conduct Apollo 15's famous "hammer-feather drop" experiment
• a small aluminum sculpture, a tribute to the American and Soviet "fallen astronauts" who died in the space race -- left by the crew of Apollo 15
• a patch from the never-launched Apollo 1 mission, which ended prematurely when flames engulfed the command module during a 1967 training exercise, killing three U.S. astronauts
• a small silicon disk bearing goodwill messages from 73 world leaders, and left on the moon by the crew of Apollo 11
• a silver pin, left by Apollo 12 astronaut Alan Bean
• a medal honoring Soviet cosmonauts Vladimir Komarov and Yuri Gagarin
• a cast golden olive branch left by the crew of Apollo 11