>Himal Gautam, the director of Nepal’s tourism department, which is responsible for regulating expeditions on the nation’s mountains, said in an interview that using the gas was “against climbing ethics,” and that it would hurt the country’s tourism industry and the Sherpas who help climbers by reducing their time on the mountain. In that Everest is basically a garbage dump now - oxygen bottles, toilet paper and bodies litter the main paths, I'm not real sure how they can argue an "ethics" perspective. Less time on mountain should result in less pollution, so I'd think that would be a good thing.