Green Technology

South African mining company AngloAmerican is using a waste product of coal mining to make bricks for homes.  Gypsum a by-product, is mixed with cement to make “ …‘low cement’ bricks for housing in the city of eMalahleni.” 

Operations recover about 200 tons / day of gypsum and at a rate of about 8 tons / house can be used to make close to 25 homes / day.

Estimates are that the low cement reduce 3 metric tons for each house build compared to houses made from traditional bricks.

See this CNN video for more information.

Via:  SmartPlanet  LINK