natural wonders and what they can do to reserve the trend. They do not need much convincing. The travelers on these excursions are already committed to environmental protection. In fact, a two-year study of litter in Antarctica found that the entire collection of litter left by visitors to the continent could be put in one small sandwich bag. Compare that amount of litter with what the average traveler finds strewn on the streets around the hotel, even an environmentally sensitive hotel.