[refurb]

The only problem I have with it is that bodies are rarely taken back and therefore contribute to the pollution of the mountain.

A dead human body is "pollution"? I guess you can counting the clothing and equipment as pollution or trash, but I would call a dead human body quite "natural".

[gambiting]

Well, in an environment where the human body will never decay it's pretty much pollution. Please don't take it wrongly - I don't mean to disrespect those that died there,but it's true that their bodies stay there for years. And how many dead bodies can Mount Everest keep until it looks like a scene from some depiction of hell? 100? 1000? 10000?