To be is to deposit.

 Here is a partial list 
 of the trash that humans have left on the moon: 
 more than 70 spacecraft including rovers, modules, and crashed orbiters,
 12 pairs of boots, 
 2 golf balls,
 an assortment of empty packages of space food,
 TV cameras,
 various hammers, tongs, rakes, and shovels;
 backpacks, insulating blankets, 
 utility towels, used wet-wipes,
 discarded 'personal hygiene kits'
 and 96 bags containing the piss, shit, and vomit of departed astronauts.

 Humans have left, all told, nearly 400,000 pounds 
(= nearly 200,000 kg) of stuff on the surface of the moon;
 Buzz Aldrin and Neil Armstrong alone left more than 100 items on the Sea of Tranquillity
 — including a plaque claiming that "we came in peace for all mankind."

And soon, of course, more mendacious and meretricious advertising
will be placed on the helpless, battered satellite —
a chemical drink will start off the commercial blight.