According to the AP, Mount Rainier National Park is "celebrating" the installation of a $70,000 ecologically correct toilet at Cougar Rock Campground.
The toilet was donated by Groundwork Mishima, a group that promotes volunteerism at Mount Fuji, which has a "sister mountain" relationship with the park.
The toilet was installed with the help of students from the Japanese Volunteers-in-Parks Association.
The toilet uses cedar chips and natural composting to operate with little water or odor.
Here's a volunteers group blog post about it.