If it's an environmental expedition, it seems to me the primary goal should be to clean up what's on Everest like the tent parts, oxygen bottles and other trash. It gets to be misleading when you run the whole media gamut.

For many climbers, Everest is usually a one-time deal.

Here's the interesting part. The people who go to Everest on a regular basis, like the commercial expeditions that go back and forth each year, while some don't like the commercial outfitters, one benefit is that when they go, they know they're going back the next year. So they're less likely to leave their trash because they're camping there next year.