With a tractor equipped with an earth auger they bore into the ground.

Marcos Fiovavanti, of the Ecuador-based "Fundacion In Terris" group, talks about the "Earth Auger Toliet" on display at the "Reinventing the Toliet" Fair, Tuesday, Aug. 14, 2012, in Seattle, which is part of a Bill & Melinda Gates Foundation competition to reinvent the toilet.