Catalogue

Arctic North American communities typically have honey buckets with lagoon wastewater disposal. As in other circumpolar communities, running piped…

Ceramic candle filters are simple devices made out of clay and used to filter drinking water in order to removes turbidity, suspended materials and…

Offering a training certificate is useful to the trainer because it allows you to leave a more lasting impression on those who you are training and…

A cesspit, or cesspool is a tank pit used for the temporary collection and storage of sewage or waste. The pit is sometimes lined with bricks or…

Gully plugs, also called check dams, are mainly built to prevent erosion and to settle sediments and pollutants. Furthermore, it is possible to keep…