Douglas Adams, Hitchiker’s Guide:
For years, the fabulously beautiful planet of Bethselamin increased its booming tourist industry without any worries at all. Alas, as is often the case, this was an act of utter stupidity, as it led to a colossal cumulative erosion problem. Of course, what else could one expect with ten billion tourists per annum? Thus today the net balance between the amount you eat and the amount you excrete while on the planet is surgically removed from your body weight when you leave; so every time you got to the lavatory there, it is vitally important to get a receipt.
Discovery Channel News, 2014:
Climbers on Mount Everest will be forced to bring back eight kilograms (17.6 pounds) of garbage, an official said Monday, to clean up a peak that has become the world’s highest rubbish dump.
The rule, one of several new measures covering mountaineering in the Himalayan nation, will apply to climbers ascending beyond Everest’s base camp from April onwards, said tourism ministry official Madhusudan Burlakoti.
“The government has decided in order to clean up Mount Everest that each member of an expedition must bring back at least eight kilos of garbage, apart from their own trash,” he said.
Burlakoti, who is joint secretary at the ministry, said authorities would take legal action against climbers who failed to comply with the new rule, although it was unclear whether this would involve a fine or the confiscation of their mandatory deposit.