Documents in Portable Document Format (PDF) require Adobe Acrobat Reader 5.0 or higher to view; download Adobe Acrobat Reader.

 

 

 

 

The double-vault dehydrating toilet used in Central America and Mexico - "Lasf" for Letrina Abonera Seca Familiar

 

image of

 

image of

 

image of
 

 

Credit: Ecological Sanitation, SIDA, Sweden, 1998.